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Table of Contents
- Introduction
- Did you know?
- Key features
- Comparing the SR635 V3 to the SR635
- Components and connectors
- System architecture
- Standard specifications
- Models
- Processors
- Memory options
- Internal storage
- Controllers for internal storage
- Internal drive options
- Internal backup units
- Optical drives
- I/O expansion
- Network adapters
- Fibre Channel host bus adapters
- SAS adapters for external storage
- Flash storage adapters
- GPU adapters
- Cooling
- Power supplies
- Systems management
- Security
- Rack installation
- Operating system support
- Physical and electrical specifications
- Operating environment
- Water infrastructure for the Lenovo Neptune Processor DWC Module
- RM100 In-Rack Coolant Distribution Unit
- Warranty upgrades and post-warranty support
- Services
- Lenovo TruScale
- Regulatory compliance
- External drive enclosures
- External storage systems
- External backup units
- Fibre Channel SAN switches
- Uninterruptible power supply units
- Power distribution units
- Rack cabinets
- KVM console options
- Lenovo Financial Services
- Seller training courses
- Related publications and links
- Related product families
- Trademarks
Abstract
The Lenovo ThinkSystem SR635 V3 is a 1-socket 1U server that features the 5th Gen AMD EPYC 9005 Series "Turin" family of processors. With up to 160 processor cores and support for the PCIe Gen5 standard for I/O, the SR635 V3 offers the ultimate in one-socket server performance in a 1U form factor.
This product guide provides essential pre-sales information to understand the ThinkSystem SR635 V3 server, its key features and specifications, components and options, and configuration guidelines. This guide is intended for technical specialists, sales specialists, sales engineers, IT architects, and other IT professionals who want to learn more about the SR635 V3 and consider its use in IT solutions.
Change History
Changes in the April 22, 2025 update:
- Added the following memory DIMMs - Memory options section:
- ThinkSystem 16GB TruDDR5 6400MHz (1Rx8) RDIMM-A v2, 4X77B07417
- ThinkSystem 32GB TruDDR5 6400MHz (2Rx8) RDIMM-A v2, 4X77B07419
- ThinkSystem 48GB TruDDR5 6400MHz (2Rx8) RDIMM-A v2, 4X77B07423
- ThinkSystem 96GB TruDDR5 6400MHz (2Rx4) RDIMM-A v2, 4X77B07424
- ThinkSystem 128GB TruDDR5 6400MHz (2Rx4) RDIMM-A v2, 4X77B07421
- Removed support for the following DIMM:
- ThinkSystem 64GB TruDDR5 6400MHz (2Rx4) RDIMM-A v2, CA1L
- Added the following Read Intensive NVMe SSDs - Internal drive options section:
- ThinkSystem 2.5" U.2 PM9D3a 960GB Read Intensive NVMe PCIe 5.0 x4 HS SSD, 4XB7A93066
- ThinkSystem 2.5" U.2 PM9D3a 1.92TB Read Intensive NVMe PCIe 5.0 x4 HS SSD, 4XB7A93067
- ThinkSystem 2.5" U.2 PM9D3a 3.84TB Read Intensive NVMe PCIe 5.0 x4 HS SSD, 4XB7A93068
- ThinkSystem 2.5" U.2 PM9D3a 7.68TB Read Intensive NVMe PCIe 5.0 x4 HS SSD, 4XB7A93069
- ThinkSystem 2.5" U.2 PM9D3a 15.36TB Read Intensive NVMe PCIe 5.0 x4 HS SSD, 4XB7A93095
- Added the following Mixed Use NVMe SSDs - Internal drive options section:
- ThinkSystem 2.5" U.2 PM9D5a 800GB Mixed Use NVMe NVMe PCIe 5.0 x4 HS SSD, 4XB7A93097
- ThinkSystem 2.5" U.2 PM9D5a 1.6TB Mixed Use NVMe NVMe PCIe 5.0 x4 HS SSD, 4XB7A93098
- ThinkSystem 2.5" U.2 PM9D5a 3.2TB Mixed Use NVMe NVMe PCIe 5.0 x4 HS SSD, 4XB7A93099
- ThinkSystem 2.5" U.2 PM9D5a 6.4TB Mixed Use NVMe NVMe PCIe 5.0 x4 HS SSD, 4XB7A93100
- ThinkSystem 2.5" U.2 PM9D5a 12.8TB Mixed Use NVMe NVMe PCIe 5.0 x4 HS SSD, 4XB7A93101
Introduction
The Lenovo ThinkSystem SR635 V3 is a 1-socket 1U server that features the 5th Gen AMD EPYC 9005 Series "Turin" family of processors. With up to 160 processor cores and support for the PCIe Gen5 standard for I/O, the SR635 V3 offers the ultimate in one-socket server performance in a 1U form factor. The server is ideal for dense workloads that can take advantage of GPU processing and high-performance NVMe drives.
Suggested uses: AI Inference, VDI, OLTP, Analytics, HPC, software-defined storage
Did you know?
The SR635 V3 server offers onboard NVMe PCIe ports that allow direct connections to 12x NVMe SSDs, which frees up PCIe slots and helps lower NVMe solution acquisition costs.
Key features
Combining performance and flexibility, the SR635 V3 server is a great choice for enterprises of all sizes. The server offers a broad selection of drive and slot configurations and offers high performance features that industries such as finance, healthcare and telco need. Outstanding reliability, availability, and serviceability (RAS) and high-efficiency design can improve your business environment and can help save operational costs.
Scalability and performance
The following features boost performance, improve scalability and reduce costs:
- Supports one 5th Gen AMD EPYC 9005 processors
- Up to 160 cores and 320 threads
- Core speed of up to 4.0 GHz
- TDP rating of up to 400 W
- Supports one 4th Gen AMD EPYC 9004 processors
- Up to 128 cores and 256 threads
- Core speed of up to 4.1 GHz
- TDP rating of up to 400 W
- Support for DDR5 memory DIMMs to maximize the performance of the memory subsystem:
- 12 DDR5 memory DIMMs
- 12 memory channels (1 DIMM per channel)
- DIMM speeds up to 6400 MHz
- Using 256GB 3DS RDIMMs, the server supports up to 3TB of system memory
- Supports up to four single-width GPUs (3 in rear slots, 1 in front slots), each up to 75W for substantial processing power in a 1U system.
- The server is Compute Express Link (CXL) v1.1 Ready. With CXL 1.1 for next-generation workloads, you can reduce compute latency in the data center and lower TCO. CXL is a protocol that runs across the standard PCIe physical layer and can support both standard PCIe devices as well as CXL devices on the same link.
- Supports up to 12x 2.5-inch hot-swap drive bays, by using combinations of front-accessible (up to 10 bays) and rear-accessible (2 bays).
- Supports 16x NVMe drives without the need for additional NVMe adapters and without oversubscription of PCIe lanes (1:1 connectivity). The use of NVMe drives maximizes drive I/O performance, in terms of throughput, bandwidth, and latency.
- Supports 12x SATA drives using the onboard SATA controller (no additional adapter needed), enabling lower cost, high capacity storage solution for cold storage workloads.
- Supports 12x SAS drives using a variety of support RAID controllers or SAS HBAs.
- Supports high-speed RAID controllers from Lenovo and Broadcom providing 12 Gb SAS connectivity to the drive backplanes. A variety of PCIe 3.0 and PCIe 4.0 RAID adapters are available.
- Supports two externally accessible 7mm hot-swap drives for operating system boot functions or data storage. Optional RAID-0 or RAID-1.
- Supports M.2 drives for convenient operating system boot functions or data storage. Available M.2 adapters support either one M.2 drive or two M.2 drives. Optional RAID-0 or RAID-1.
- Supports up to 5x PCIe slots, 3x at the rear of the server and 2x at the front of the server. Also supports 1x OCP 3.0 slot, either in the front or in the rear.
- The server has a dedicated industry-standard OCP 3.0 small form factor (SFF) slot, with a PCIe 5.0 x16 interface, supporting a variety of Ethernet network adapters. Simple-swap mechanism with thumbscrews and pull-tab enables tool-less installation and removal of the adapter. Supports shared BMC network sideband connectivity to enable out-of-band systems management.
- The server offers PCI Express 5.0 (PCIe Gen 5) I/O expansion capabilities that doubles the theoretical maximum bandwidth of PCIe 4.0 (32GT/s in each direction for PCIe 5.0, compared to 16 GT/s with PCIe 4.0). A PCIe 5.0 x16 slot provides 128 GB/s bandwidth, enough to support a 400GbE network connection.
- The server uses the Lenovo Neptune closed-loop liquid-cooled heatsink design to more effectively remove heat from high-performance processor SKUs.
Availability and serviceability
The server provides many features to simplify serviceability and increase system uptime:
- Designed to run 24 hours a day, 7 days a week
- The server uses ECC memory and supports memory RAS features including Single Device Data Correction (SDDC, also known as Chipkill), Patrol/Demand Scrubbing, Bounded Fault, DRAM Address Command Parity with Replay, DRAM Uncorrected ECC Error Retry, On-die ECC, ECC Error Check and Scrub (ECS), and Post Package Repair.
- The server offers hot-swap drives, supporting RAID redundancy for data protection and greater system uptime.
- Available M.2 configuration with RAID support which can enable two SATA or two NVMe M.2 drives to be configured as a redundant pair.
- The server has up to two hot-swap redundant power supplies and up to seven hot-swap redundant fans to provide availability for business-critical applications.
- Optional front-accessible slots and drives so that most major components and cables (except power) are located at the front of the server
- The power-source-independent light path diagnostics uses LEDs to lead the technician to failed (or failing) components, which simplifies servicing, speeds up problem resolution, and helps improve system availability.
- Solid-state drives (SSDs) offer more reliability than traditional mechanical HDDs for greater uptime.
- Proactive Platform Alerts (including PFA and SMART alerts): Processor, voltage regulators, memory, internal storage (SAS/SATA HDDs and SSDs, NVMe SSDs, M.2 storage, flash storage adapters), fans, power supplies, RAID controllers, server ambient and subcomponent temperatures. Alerts can be surfaced through the XClarity Controller to managers such as Lenovo XClarity Administrator, VMware vCenter, and Microsoft System Center. These proactive alerts let you take appropriate actions in advance of possible failure, thereby increasing server uptime and application availability.
- The built-in XClarity Controller 2 continuously monitors system parameters, triggers alerts, and performs recovery actions in case of failures to minimize downtime.
- Built-in diagnostics in UEFI, using Lenovo XClarity Provisioning Manager, speed up troubleshooting tasks to reduce service time.
- Lenovo XClarity Provisioning Manager supports diagnostics and can save service data to a USB key drive or remote CIFS share folder for troubleshooting and reduce service time.
- Auto restart in the event of a momentary loss of AC power (based on power policy setting in the XClarity Controller service processor)
- Offers a diagnostics port on the front of the server to allow you to attach an external diagnostics handset for enhanced systems management capabilities.
- Support for the XClarity Administrator Mobile app running on a supported smartphone and connected to the server through the service-enabled USB port, enables additional local systems management functions.
- Three-year or one-year customer-replaceable unit and onsite limited warranty, 9 x 5 next business day. Optional service upgrades are available.
Manageability and security
Systems management features simplify local and remote management:
- The server includes an XClarity Controller 2 (XCC2) to monitor server availability. Optional upgrade to XCC Platinum to provide remote control (keyboard video mouse) functions, support for the mounting of remote media files, FIPS 140-3 security, enhanced NIST 800-193 support, boot capture, and other management and security features.
- Lenovo XClarity Administrator offers comprehensive hardware management tools that help to increase uptime, reduce costs and improve productivity through advanced server management capabilities.
- UEFI-based Lenovo XClarity Provisioning Manager, accessible from F1 during boot, provides system inventory information, graphical UEFI Setup, platform update function, RAID Setup wizard, operating system installation function, and diagnostic functions.
- Support for Lenovo XClarity Energy Manager which captures real-time power and temperature data from the server and provides automated controls to lower energy costs.
- An integrated industry-standard Unified Extensible Firmware Interface (UEFI) enables improved setup, configuration, and updates, and simplifies error handling.
- Support for industry standard management protocols, IPMI 2.0, SNMP 3.0, Redfish REST API, serial console via IPMI
- An integrated hardware Trusted Platform Module (TPM) supporting TPM 2.0 enables advanced cryptographic functionality, such as digital signatures and remote attestation.
- Administrator and power-on passwords help protect from unauthorized access to the server.
- Supports AMD Secure Root-of-Trust, Secure Run and Secure Move features to minimize potential attacks and protect data as the OS is booted, as applications are run and as applications are migrated from server to server.
- Supports Secure Boot to ensure only a digitally signed operating system can be used.
- Industry-standard Advanced Encryption Standard (AES) NI support for faster, stronger encryption.
- Additional physical security features are a chassis intrusion switch and a lockable front bezel.
Energy efficiency
The following energy-efficiency features help save energy, reduce operational costs, and increase energy availability:
- Energy-efficient planar components help lower operational costs.
- High-efficiency power supplies with 80 PLUS Titanium certifications
- Low-voltage 1.1 V DDR5 memory offers energy savings compared to 1.2 V DDR4 DIMMs, an approximately 20% decrease in power consumption
- Solid-state drives (SSDs) consume as much as 80% less power than traditional spinning 2.5-inch HDDs.
- The server uses hexagonal ventilation holes, which can be grouped more densely than round holes, providing more efficient airflow through the system and thus keeping your system cooler.
- Optional Lenovo XClarity Energy Manager provides advanced data center power notification and analysis to help achieve lower heat output and reduced cooling needs.
Comparing the SR635 V3 to the SR635
The ThinkSystem SR635 V3 improves on the previous generation SR635, as summarized in the following table.
Components and connectors
The following figure shows the front of the server.
The following figure shows the components visible from the rear of the server. As shown, there are four different configurations available, including two with rear-mounted drive bays: two 2.5-inch hot-swap drive bays (SAS, SATA or NVMe) or new 7mm thickness hot-swap drives (SATA or NVMe).
Standard specifications
The following table lists the standard specifications.
| Components | Specification |
|---|---|
| Machine types | 7D9H - 1 year warranty 7D9G - 3 year warranty |
| Form factor | 1U rack. |
| Processor | One AMD EPYC processor, either 5th Gen 9005 ("Turin") or 4th Gen 9004 ("Genoa"). Supports processors up to 160 cores, core speeds of up to 4.1 GHz, and TDP ratings of up to 400W. Supports PCIe 5.0 for high performance I/O. |
| Chipset | Not applicable (platform controller hub functions are integrated into the processor) |
| Memory | 12 DIMM slots. The processor has 12 memory channels, with 1 DIMM per channel (DPC). Lenovo TruDDR5 RDIMMs, 3DS RDIMMs, and 9x4 RDIMMs are supported. Memory speeds up to 6400 MHz with 5th Gen AMD EPYC processors. |
| Memory maximum | Up to 3TB with 12x 256GB 3DS RDIMMs |
| Persistent memory | Not supported |
| Memory protection | ECC, SDDC, Patrol/Demand Scrubbing, Bounded Fault, DRAM Address Command Parity with Replay, DRAM Uncorrected ECC Error Retry, On-die ECC, ECC Error Check and Scrub (ECS), Post Package Repair |
| Disk drive bays |
Up to 12x 2.5-inch hot-swap drive bays:
Note: The SR635 V3 does not offer 3.5-inch drive bays. See Storage configurations for details. AnyBay bays support SAS, SATA or NVMe drives. NVMe bays only support NVMe drives. Rear drive bays can be used in conjunction with 2.5-inch front drive bays. The server supports up to 12x NVMe drives all with direct connections (no oversubscription). |
| Maximum internal storage |
|
| Storage controller |
|
| Optical drive bays | No internal optical drive. |
| Tape drive bays | No internal backup drive. |
| Network interfaces | Dedicated OCP 3.0 SFF slot with PCIe 5.0 x16 host interface, either at the rear of the server (rear-accessible) or the front of the server (front-accessible). Supports a variety of 2-port and 4-port adapters with 1GbE, 10GbE and 25GbE network connectivity. One port can optionally be shared with the XClarity Controller 2 (XCC2) management processor for Wake-on-LAN and NC-SI support. Additional PCIe network adapters supported in PCIe slots. |
| PCI Expansion slots |
Up to 5x PCIe slots:
Four choices for rear-access slots:
For 2.5-inch front drive configurations, the server supports the installation of a CFF RAID adapter or HBA in a dedicated area that does not consume any of the PCIe slots. PCIe slots at the front of the server:
|
| GPU support | Supports up to 4x single-wide GPUs |
| Ports |
Front: 1x USB 3.1 G1 (5 Gb/s) port, 1x USB 2.0 port (also for XCC local management), External diagnostics port, optional VGA port. Rear: 3x USB 3.1 G1 (5 Gb/s) ports, 1x VGA video port, 1x RJ-45 1GbE systems management port for XCC remote management. Optional 2nd XCC remote management port (installs in OCP slot). Optional DB-9 COM serial port (installs in slot 3). Internal: 1x USB 3.1 G1 (5 Gb/s) connector for operating system or license key purposes. |
| Cooling | Up to 7x N+1 redundant hot swap 40 mm fans, configuration dependent. One fan integrated in each power supply. For high-performance CPUs, the SR635 V3 also offers a closed-loop liquid-cooled heatsink design to more effectively remove heat from the processors. For customers with water infrastructure in their data center, the SR635 V3 also offers Lenovo Neptune Core open-loop water cooling for efficient heat removal. |
| Power supply | Up to two hot-swap redundant AC power supplies, 80 PLUS Platinum or 80 PLUS Titanium certification. 750 W, 1100 W and 1800 W AC options, supporting 220 V AC. 750 W and 1100 W options also support 110V input supply. In China only, all power supply options support 240 V DC. Also available is a 1100W power supply with a -48V DC input. |
| Video | Embedded video graphics with 16 MB memory with 2D hardware accelerator, integrated into the XClarity Controller. Maximum resolution is 1920x1200 32bpp at 60Hz. |
| Hot-swap parts | Drives, power supplies, and fans. |
| Systems management | Operator panel with status LEDs. Optional External Diagnostics Handset with LCD display. Models with 8x 2.5-inch front drive bays can optionally support an Integrated Diagnostics Panel. XClarity Controller 2 (XCC2) embedded management based on the ASPEED AST2600 baseboard management controller (BMC). Dedicated rear Ethernet port for XCC2 remote access for management. Optional 2nd redundant XCC2 remote port supported, installs in the OCP slot. XClarity Administrator for centralized infrastructure management, XClarity Integrator plugins, and XClarity Energy Manager centralized server power management. Optional XCC Platinum to enable remote control functions and other features. |
| Security features | Chassis intrusion switch, Power-on password, administrator's password, Root of Trust module supporting TPM 2.0 and Platform Firmware Resiliency (PFR). Optional lockable front security bezel. |
| Operating systems supported | Microsoft Windows Server, Microsoft Windows 10 & 11, Red Hat Enterprise Linux, SUSE Linux Enterprise Server, VMware ESXi, Ubuntu Server. See the Operating system support section for specifics. |
| Limited warranty | Three-year customer-replaceable unit and onsite limited warranty with 9x5 next business day (NBD). |
| Service and support | Optional service upgrades are available through Lenovo Services: 4-hour or 2-hour response time, 6-hour fix time, 1-year or 2-year warranty extension, software support for Lenovo hardware and some third-party applications. |
| Dimensions | Width: 440 mm (17.3 in.), height: 43 mm (1.7 in.), depth: 773 mm (30.4 in.). See Physical and electrical specifications for details. |
| Weight | Maximum: 20.2 kg (44.6 lb) |
Models
ThinkSystem SR635 V3 models can be configured by using the Lenovo Data Center Solution Configurator (DCSC).
Topics in this section:
CTO models
ThinkSystem SR635 V3 models can be configured by using the Lenovo Data Center Solution Configurator (DCSC).
Configure-to-order (CTO) models are used to create models with factory-integrated server customizations. For CTO models, two types of base CTO models are available for the SR635 V3 as listed in the columns in the following table:
- General purpose base CTO models are for general business (non-HPC) and is selectable by choosing General Purpose mode in DCSC.
- AI and HPC base models are intended for Artificial Intelligence (AI) and High Performance Computing (HPC) configurations and solutions are enabled using the AI & HPC Hardware - ThinkSystem Hardware mode in DCSC. These configurations, along with Lenovo EveryScale Solutions, can also be built using System x and Cluster Solutions Configurator (x-config). Tip: Some HPC and AI models are not listed in DCSC and can only be configured in x-config.
Controlled GPU models: The "Controlled GPU" base CTO models listed in the table are the only models that support high-performance GPUs and accelerators. These models are classified under US Government ECCN regulations and have limited market and customer availability. All other base models do not support high-performance GPUs.
Preconfigured server models may also be available for the SR635 V3, however these are region-specific; that is, each region may define their own server models, and not all server models are available in every region.
The following table lists the base CTO models of the ThinkSystem SR635 V3 server.
CTO models for Windows 10 and Windows 11
The SR635 V3 can run Windows 10 and Windows 11, however only a subset of adapters and drives can be installed. For ease of configuration, the following Base CTO models have been announced to assist building a configuration that can be used with the client operating systems. For more information, see the Windows 10 and Windows 11 section.
Base feature codes
Models of the SR635 V3 are defined based on whether or not front PCIe slots are configured. The feature codes for these chassis bases are as listed in the following table.
Preconfigured models
The following tables list the available preconfigured models, grouped by region.
Refer to the Specifications section for information about standard features of the server.
Common to all models:
- Power supplies are Platinum unless otherwise stated
- All models include a Toolless Slide Rail Kit
Models for Australia and New Zealand
Common to all Australia and New Zealand models:
- All models include a Toolless Slide Rail Kit and Cable Management Arm
† Processor description: Processor model, number of cores, thermal design power (TDP), core frequency
Processors
The SR635 V3 supports processors in the fourth-generation AMD EPYC family of processors. The server supports one processor.
Topics in this section:
Processor options
The SR635 V3 supports the following processor families:
- 5th Gen AMD EPYC processors (formerly codenamed "Turin"):
- Processors with Zen 5 architecture, with high per-core performance
- Processors with Zen 5c architecture, with high core density and best power efficiency
- 4th Gen AMD EPYC processors:
- 4th Gen AMD EPYC processors (formerly codenamed "Genoa")
- 4th Gen AMD EPYC processors with Zen 4c architecture (formerly codenamed "Bergamo"), with higher core counts, suitable for workloads like cloud-native applications
All supported processors have the following characteristics:
- 12 DDR5 memory channels
- 128 PCIe 5.0 I/O lanes, 64 lanes available for PCIe and NVMe devices
Configuration notes:
- All 5th Gen processors support a 6400 MHz memory bus speed provided specific memory DIMMs are installed in the server and the latest system firmware is applied. See the table in the Memory options section to see which DIMMs support 6400 MHz. For all other DIMMs, the memory bus operates at 6000 MHz.
The following table lists the 5th Gen AMD EPYC processors supported by the SR635 V3.
The following table lists the 4th Gen AMD EPYC processors supported by the SR635 V3.
Processor features
The following table lists the features of the supported 5th Gen AMD EPYC processors.
6400 MHz memory support: The processors support memory up to 6400 MHz provided that specific memory DIMMs are installed in the server and the latest system firmware is applied. See the table in the Memory options section to see which DIMMs support 6400 MHz.
† The maximum single-core frequency that the processor is capable of operating
The following table lists the features of the supported 4th Gen AMD EPYC processors.
† The maximum single-core frequency that the processor is capable of operating
Thermal requirements by processor
For processors with a TDP of 320W or more (with some exceptions), the server must be configured as follows (one or both):
- Configure the closed-loop liquid-cooled heatsink (derived feature BSH6, enabled using feature BSWC), as described in the Closed-loop liquid-cooled heatsink section below
- Limit the drive backplanes used to only one of the 4-bay front drive backplanes (features BCGB or BPC9 as described in the Front drive bays section)
Exceptions to this rule (certain processor SKUs, drive-bay configurations, and ambient temperatures) are documented in the Thermal Rules section in the Lenovo Docs site for the SR635 V3:
https://pubs.lenovo.com/sr635-v3/thermal_rules
The SR635 V3 supports different processor heatsink solutions, depending on the configuration, as listed in the following table.
| Feature code | Description |
|---|---|
| BQ26 | Performance heatsink - Neptune Thermal Transfer Module |
| BSH6 | Closed-loop liquid-cooled heatsink - Neptune Liquid to Air Module |
The selection of the heatsink will be automatically derived by the configurator and depends on the processor and other components selected. Use the tables in the Lenovo Docs site to determine the requirements for each heatsink:
https://pubs.lenovo.com/sr635-v3/thermal_rules
Lenovo Neptune Liquid to Air Module - Closed-loop liquid cooling
The Lenovo Neptune Liquid to Air (L2A) Module is a closed-loop liquid-cooled processor heatsink, and is primarily used for processors with a TDP of 320W or more. Without the closed-loop heatsink, the use of processors ≥ 320W TDP (except for 9654 and 9654P) requires that only 4x front 2.5-inch drive bays be configured. The use of the closed-loop heatsink allows for 10x SAS/SATA or NVMe drives bays.
The only exception to this rule is the use of the 9654 and 9654P 360W processors which allow the use of 10x 2.5-inch drive bays, provided the ambient temperature be no more than 25°C.
The following figure shows the placement of the components in the closed-loop system. A cold plate is mounted on top of the processor and it is connected via aluminum tubes to a radiator that is placed in front of the system fans. The tubes contain a mixture of water and ethylene glycol (EGW). The liquid is actively pumped through the pipes in a closed loop to remove the heat from the processors.
Figure 6. SR635 V3 with closed loop heatsink (feature BSH6)
To enable closed-loop liquid-cooled heatsink in the DCSC configurator:
- In the Base tab, select Base as ThinkSystem V3 1U 10x2.5" Chassis (feature BLK4)
- Select Datacenter Environment of 25 Degrees Celsius (feature BL0H)
- In the Processor tab, select ThinkSystem SR635 V3 Neptune Liquid to Air Module (feature BSWC)
- Select a processor with TDP ≥ 320W
The closed-loop liquid-cooled heatsink has the following requirements:
- One of the following 2.5-inch front drive bay configurations:
- 10x 2.5" NVMe Gen4 (not Gen5)
- 10x 2.5" SAS/SATA
- 8x 2.5'' SAS/SATA
- 6x SAS/SATA + 4x AnyBay
- 6x SAS/SATA + 2x AnyBay + 2x NVMe
- EDSFF front drive bays are not supported
- If a RAID 940 or 9350 adapter is configured:
- RAID supercap must be installed in slot 3
- 7mm drives are not supported
- The following components are not supported:
- 256GB 3DS RDIMMs
- Rear 2.5-inch drives
- M.2 drives
- Any internal RAID/HBAs (CFF form factor)
For specific requirements, see the Thermal Rules page at https://pubs.lenovo.com/sr635-v3/thermal_rules.
Lenovo Processor Neptune Core Module - Open-loop liquid cooling
The SR635 V3 also supports advanced direct-water cooling (DWC) capability with the Lenovo Processor Neptune Core Module. This module implements a liquid cooling solution where heat from the processors is removed from the rack and the data center using an open loop and coolant distribution units.
With the Processor Neptune Core Module, all heat generated by the processors is removed from the server using water. This means that the server fans and data center air conditioning units only need to remove the heat generated by the other components. This results in lower air conditioning costs and it enables the use of slower fans which results in lower overall power consumption.
The following figure shows the Lenovo Processor Neptune Core Module.
Figure 7. Lenovo Processor Neptune Core Module
The Processor Neptune Core Module also includes a leak detection module which can detect a leakage of more than 0.5ml (about 10 drops) along the length of the tube and then issue an event to the XClarity Controller. XCC will then post an error to the System Event Log and enable further actions. Once the liquid evaporates, a further event is issue to XCC.
The Processor Neptune Core Module is only available in CTO orders, not as a field upgrade. Ordering information is listed in the following table.
| Part number | Feature code | Description |
|---|---|---|
| CTO only | C1PM* | ThinkSystem V3 1U/2U Neptune Processor Direct Water Cooling Solution |
* In DCSC, this feature code is listed in the Processor tab
Configuration notes:
- The Processor Neptune Core Module requires water infrastructure be available in the rack cabinet and data center, as described in the Water infrastructure section.
- All processor SKUs are supported
- All front drive bay configurations are supported
- Slot 2 is not available for adapters - the water loop is routed through the space otherwise occupied by slot 2
- Only the following slot configurations are supported:
- 2x Low profile x16 slots, in slot 1 and slot 3
- 1x Low profile x16 slot in slot 1, and 2x 7mm drives in slot 3
- Rear 2.5-inch drive bays are not supported
- RAID flash power module (supercap) support is limited only to positions 1 (2.5-inch drives only) or position 3 (slot 3), as described in the RAID flash power module (supercap) support section. Location 2 on the air baffle is not supported.
- M.2 adapters are supported based on the configurations in the Storage configurations section
- Standard fans can be configured in most configurations
- The use of a cable management arm (CMA) is not supported
For more information, see the Thermal Rules page:
https://pubs.lenovo.com/sr635-v3/thermal_rules
The following figure shows the Lenovo Neptune Processor DWC Module installed in the SR635 V3.
Figure 8. Lenovo Neptune Processor DWC Module installed in the SR635 V3
UEFI operating modes
The SR635 V3 offers preset operating modes that affect energy consumption and performance. These modes are a collection of predefined low-level UEFI settings that simplify the task of tuning the server to suit your business and workload requirements.
The following table lists the feature codes that allow you to specify the mode you wish to preset in the factory for CTO orders.
UK and EU customers: For compliance with the ERP Lot9 regulation, you should select feature BFYA. For some systems, you may not be able to make a selection, in which case, it will be automatically derived by the configurator.
| Feature code | Description |
|---|---|
| BFYA | Operating mode selection for: "Maximum Efficiency Mode" |
| BFYB | Operating mode selection for: "Maximum Performance Mode" |
The preset modes for the SR635 V3 are as follows:
- Maximum Efficiency Mode (feature BFYA): Maximizes performance/watt efficiency while maintaining reasonable performance
- Maximum Performance Mode (feature BFYB): Achieves maximum performance but with higher power consumption and lower energy efficiency.
For details about these preset modes, and all other performance and power efficiency UEFI settings offered in the SR635 V3, see the paper "Tuning UEFI Settings for Performance and Energy Efficiency on AMD Processor-Based ThinkSystem Servers", available from https://lenovopress.lenovo.com/lp1267.
Platform Secure Boot
Platform Secure Boot (PSB) is a feature of AMD EPYC processors that helps defend against threats to firmware. It is designed to provide protection in response to growing firmware-level remote attacks being seen across the industry. AMD Secure Boot extends the AMD silicon root of trust to help protect the system by establishing an unbroken chain of trust from the AMD silicon root of trust to the BIOS. The UEFI secure boot helps continue the chain of trust from the system BIOS to the OS Bootloader. This feature helps defend against remote attackers seeking to embed malware into firmware.
With PSB enabled, the processor is cryptographically bound to the server firmware code signing key once the processors are installed in the server and the server is powered on. From that point on, that processor can only be used with motherboards that use the same code signing key.
Disabling PSB will stop the protection against remote and local attackers seeking to embed malware into a platform’s firmware, BIOS and even UEFI functions. Disabling PSB also allows you to install the processor in another server that you purchased from Lenovo, however, we do not recommend you do this by yourself. Please contact the Lenovo service team for further assistance.
By default, the server has Platform Secure Boot enabled on the installed processors, however for factory orders, you can choose to have the server with PSB disabled. To do this, select feature code C18D as listed in the following table. PSB can be later enabled in System Setup if desired.
Cannot be disabled once enabled: Once you enable PSB in a server, it cannot be disabled on those processors.
If you add a second processor as a field upgrade and your server has PSB enabled, then as soon as you install the processor and power the server on, the processor is then cryptographically bound to the server, and can only be used in that server going forward.
Note: Platform Secure Boot (PSB) is different from the Secure Boot security feature described in the Platform Firmware Resiliency section.
Memory options
The SR635 V3 uses Lenovo TruDDR5 memory operating at up to 6400 MHz with 5th Gen AMD EPYC processors, and up to 4800 MHz with 4th Gen AMD EPYC processors. The server supports up to 12 DIMMs. The processor has 12 memory channels and supports 1 DIMM per channel. The server supports up to 3TB of memory using 12x 256GB 3DS RDIMMs.
Lenovo TruDDR5 memory uses the highest quality components that are sourced from Tier 1 DRAM suppliers and only memory that meets the strict requirements of Lenovo is selected. It is compatibility tested and tuned to maximize performance and reliability. From a service and support standpoint, Lenovo TruDDR5 memory automatically assumes the system warranty, and Lenovo provides service and support worldwide.
The following table lists the memory options supported in the SR635 V3 with 5th Gen AMD EPYC processors. The table also lists the maximum memory bus speed each memory DIMM supports, either 6000 MHz or 6400 MHz.
* Memory DIMM is currently CTO only. Option part numbers for field upgrades are planned.
The following table lists the memory options supported in the SR635 V3 with 4th Gen AMD EPYC processors.
9x4 RDIMMs (also known as Optimized or EC4 RDIMMs) are a lower-cost DDR5 memory option supported in ThinkSystem V3 servers. 9x4 DIMMs offer the same performance as standard RDIMMs (known as 10x4 or EC8 modules), however they support lower fault-tolerance characteristics. Standard RDIMMs and 3DS RDIMMs support two 40-bit subchannels (that is, a total of 80 bits), whereas 9x4 RDIMMs support two 36-bit subchannels (a total of 72 bits). The extra bits in the subchannels allow standard RDIMMs and 3DS RDIMMs to support Single Device Data Correction (SDDC), however 9x4 RDIMMs do not support SDDC. Note, however, that all DDR5 DIMMs, including 9x4 RDIMMs, support Bounded Fault correction, which enables the server to correct most common types of DRAM failures.
For more information on DDR5 memory, see the Lenovo Press paper, Introduction to DDR5 Memory, available from https://lenovopress.com/lp1618.
The following rules apply when selecting the memory configuration:
- Memory rated at 4800 MHz is only supported with 4th Gen processors. Memory rated at 6400 MHz memory is only supported with 5th Gen processors (and operates at 6000 MHz or 6400 MHz as indicated in the table).
- The SR635 V3 supports quantities 1, 2, 4, 6, 8, 10, 12 DIMMs per processor; other quantities not supported
- The server supports four types of DIMMs: 9x4 RDIMMs, 10x4 RDIMMs, x8 RDIMMs and 3DS RDIMMs
- UDIMMs and LRDIMMs are not supported
- Mixing of DIMM types is not supported (for example, 9x4 DIMMs with 10x4 RDIMMs)
- Mixing x4 and x8 DIMMs is not supported
- Mixing of DRAM technology (16Gb, 24Gb, 32Gb) is not supported. See the column in the above table.
- Mixing of 128GB 3DS RDIMMs and 256GB 3DS RDIMMs is not supported
- Mixing of DIMM rank counts is supported. Follow the required installation order installing the DIMMs with the higher rank counts first.
- Mixing of DIMM capacities is supported, however only two different capacities are supported across all channels of the processor (eg 16GB and 32GB). Follow the required installation order installing the larger DIMMs first.
- Memory operates at the speed of the memory bus of the processor - see the Processor features section for specifics
- The use of the 128GB 3D RDIMM feature BYEE has the following requirements for thermal reasons:
- Performance fans are required
- Rear 2.5-inch drives are not supported
- GPUs are not supported
- Additional ambient temperature requirements - see https://pubs.lenovo.com/sr635-v3/thermal_rules for information
Note: Memory mirroring and memory rank sparing are not supported.
For best performance, consider the following:
- Ensure the memory installed is at least the same speed as the memory bus of the selected processor.
- Populate all 12 memory channels with identical DIMMs (same Lenovo part number)
The following memory protection technologies are supported:
- ECC detection/correction
- Bounded Fault detection/correction
- SDDC (for x4-based memory DIMMs; look for "x4" in the DIMM description. Not supported with 9x4 RDIMMs)
- Patrol/Demand Scrubbing
- DRAM Address Command Parity with Replay
- DRAM Uncorrected ECC Error Retry
- On-die ECC
- ECC Error Check and Scrub (ECS)
- Post Package Repair
Internal storage
The SR635 V3 supports 12x 2.5-inch or 16x EDSFF drive bays, depending on the selected chassis and backplane configuration. The server also supports configurations without any drive bays if desired.
No 3.5-inch drive bay support: The SR635 V3 does not support configurations with 3.5-inch drive bays.
The two drive bay zones are as follows:
- Front:
- Up to 10x 2.5-inch hot-swap bays, or
- 16x EDSFF hot-swap bays
- Rear:
- 2x 2.5-inch hot-swap bays, or
- 2x 7mm hot-swap drives bays
All drives are hot-swap and are accessible from the front or from the rear.
The server also supports one or two M.2 drives, installed in an M.2 adapter internal to the server.
In this section:
NVMe drive support
The SR635 V3 supports NVMe drives to maximize storage performance:
- In 2.5-inch front drive configurations, the server supports up to 12 NVMe drives without oversubscription (that is, each x4 drive has a dedicated x4 connection (4 lanes) to the processor):
- 10x 2.5-inch NVMe drives at the front
- 2x 2.5-inch NVMe drives at the rear
- In EDSFF front drive configurations, the server supports up to 16 NVMe drives without oversubscription:
- 16x E1.S NVMe drives at the front
The specifics of these configurations are covered in the Storage configurations section.
In addition, the SR635 V3 supports two 7mm NVMe drives for use as boot drives.
RAID 940 Tri-Mode support
The RAID 940-8i and RAID 940-16i adapters also support NVMe through a feature named Tri-Mode support (or Trimode support). This feature enables the use of NVMe U.3 drives at the same time as SAS and SATA drives. Tri-Mode requires an AnyBay backplane. Cabling of the controller to the backplanes is the same as with SAS/SATA drives, and the NVMe drives are connected via a PCIe x1 link to the controller.
NVMe drives connected using Tri-Mode support provide better performance than SAS or SATA drives: A SATA SSD has a data rate of 6Gbps, a SAS SSD has a data rate of 12Gbps, whereas an NVMe U.3 Gen 4 SSD with a PCIe x1 link will have a data rate of 16Gbps. NVMe drives typically also have lower latency and higher IOPS compared to SAS and SATA drives. Tri-Mode is supported with U.3 NVMe drives and requires an AnyBay backplane.
Tri-Mode requires U.3 drives: Only NVMe drives with a U.3 interface are supported. U.2 drives are not supported. See the Internal drive options section for the U.3 drives supported by the server.
Front drive bays
The front drive bay zone supports the following configurations. All drives are hot-swap.
- 2.5-inch hot-swap drive bays - 10 drive bays
- 10x SAS/SATA
- 6x SAS/SATA + 4x AnyBay (PCIe Gen4)
- 6x SAS/SATA + 2x AnyBay + 2x NVMe (PCIe Gen4)
- 10x AnyBay (PCIe Gen4 or Gen5)
- 10x NVMe (PCIe Gen4)
- 2.5-inch hot-swap drive bays - 8 drive bays with optional integrated diagnostics panel
- 8x SAS/SATA
- 2.5-inch hot-swap drive bays - 4 drive bays with optional support for front PCIe slots
- 4x SAS/SATA
- 4x NVMe (PCIe Gen4 or Gen 5)
- EDSFF drive bays
- 16x E1.S (9.5mm or 15mm) hot-swap NVMe drive bays (PCIe Gen4)
- Drive-less 2.5-inch configuration - No backplane and no drives (supports field upgrades)
No 3.5-inch drive bay support: The SR635 V3 does not support configurations with 3.5-inch drive bays.
These configurations are shown in the following three figure. The feature codes listed correspond to the feature codes listed in the table below the figures.
The following figure shows the supported 2.5-inch drive bays drive bay configurations without PCIe slot support. 8x 2.5-inch drive configurations can be configured with or without an Integrated Diagnostics Panel with pull-out LCD display. See the Local management section for details.
Figure 9. SR635 V3 front drive bay configurations without front PCIe slots
The following figure shows the supported 2.5-inch drive bays drive bay configurations with front PCIe slot support. Front slots are mutually exclusive with rear slots. See the I/O expansion for details.
Figure 10. SR635 V3 front drive bay configurations with front PCIe slots
The backplanes used to provide these drive bays are listed in the following table.
Field upgrades: Most front backplanes are available as part numbers for field upgrades using upgrade kits, as described in the Field upgrades section below.
Rear 2.5-inch and 7mm drive bays
The SR635 V3 supports hot-swap drives installed at the rear of the server chassis. Supported configurations are as follows:
- 2x 2.5-inch hot-swap SAS/SATA drive bays
- 2x 2.5-inch hot-swap NVMe drive bays (PCIe Gen 4)
- 2x 7mm SAS/SATA drive bays
- 2x 7mm NVMe drive bays (PCIe Gen 4)
The configurations are shown in the following figure.
The backplanes used to provide these drive bays in CTO orders are listed in the following table. Backplanes are also available as part numbers for field upgrades using upgrade kits, as described in the Field upgrades section below.
The SR635 V3 supports two 7mm drive options installed in slot 3:
- 7mm drive backplane supporting SATA or NVMe drives, without integrated RAID. Optional RAID functionality is provided by a separate RAID adapter installed in a slot.
- 7mm drive backplane supporting NVMe drives (no SATA support) with integrated RAID support via an onboard Marvell 88NR2241 NVMe RAID controller
The use of rear 2.5-inch drive bays has the following configuration rules:
- With 2.5-inch rear drive bays, only slot 1 is available. Slot 2 and 3 are not available
- GPUs are not supported
The use of the 7mm rear drive bays has the following configuration rules:
- 7mm rear drive bays occupy slot 3; slots 1 and 2 are available and slot 2 is a low profile slot. Slot 3 is not available.
- M.2 RAID and 7mm RAID are mutually exclusive: they are not supported together in the same configuration
- GPUs are not supported
- For ThinkSystem 7mm SATA/NVMe 2-Bay Rear Enablement Kit v2 (feature BU0N):
- The 7mm drive bays support either SATA drives or NVMe drives but not both. You specify SATA or NVMe in the configurator using feature codes BTTV (SATA) or BTTW (NVMe).
- If RAID support is not required, the 7mm drives connect to an onboard port; No additional adapter is required
- If RAID support is required, select feature code BS7A in the configurator to enable RAID
- The support of RAID-1 with the 7mm drives requires an additional RAID adapter that is installed in PCIe slot 1 or 2:
- RAID support for 7mm SATA drives requires a RAID 5350-8i adapter (feature BT7N)
- RAID support for 7mm NVMe drives requires a RAID 540-8i adapter operating in Tri-Mode (feature BT7P)
- The RAID adapter used for 7mm drive support cannot be configured for use with other drive bays (not even with M.2)
- For ThinkSystem 1U 7mm Drive Kit w/ NVMe RAID (feature B8Q2)
- The adapter only supports NVMe drives
- RAID functionality is integrated into the M.2 adapter using a Marvell 88NR2241 NVMe RAID Controller
- For ThinkSystem 7mm SATA/NVMe 2-Bay Rear Hot-Swap RAID Enablement Kit (feature BYFG)
- The 7mm drive bays support either SATA drives or NVMe drives but not both.
- RAID functionality is integrated into the 7mm backplane using a Broadcom RAID Controller
Storage configurations
This section describes the various combinations of front and rear drives that the server supports, as well as M.2 support.
Tip: These tables are based on Config Matrix V3.30 in TRD V4.1
In this section:
The following tables summarize the storage configurations for the SR635 V3. For details, including processor requirements, M.2 and 7mm support, and controller selections, see the Storage configurations - Details section.
Overview - 2.5-inch front bays without front slots
The following table summarizes the configurations that use 2.5-inch front drive bays but do not support front PCIe slots.
Click to jump down to the details of the 2.5-inch configurations without front slots.
Overview - 2.5-inch front bays with front slots
The following table summarizes the configurations that use 2.5-inch front drive bays and support front PCIe slots.
Click to jump down to the details of the 2.5-inch configurations with front slots.
Details - 2.5-inch configurations without front slots
The following table lists the detailed configurations that use 2.5-inch front drive bays without front PCIe slots.
Click to go back to the overview of 2.5-inch configurations without front slots.
In the table:
- 7mm SATA Non-RAID means the 7mm SATA/NVMe kit (BU0N) with SATA drives. RAID is not supported.
- 7mm NVMe Non-RAID means the 7mm SATA/NVMe kit (BU0N) with NVMe drives. RAID is not supported.
- 7mm Integrated RAID means the 7mm NVMe RAID with Marvell controller (B8Q2) or 7mm SATA/NVMe RAID with a Broadcom controller (BYFG). RAID-0 and RAID-1 are supported with the integrated RAID controller.
- 7mm SATA with SFF RAID 5350-8i means the 7mm SATA/NVMe kit (BU0N) with SATA drives. NVMe drives not supported. RAID is supported with the addition of the RAID 5350-8i adapter in a rear slot.
- 7mm NVMe with SFF RAID 540-8i means the 7mm SATA/NVMe kit (BU0N) with NVMe drives. SATA drives not supported. RAID is supported with the addition of the RAID 540-8i adapter in a rear slot.
- M.2 x1 SATA Non-RAID means the M.2 SATA/NVMe adapter (4Y37A09738) with SATA drives. RAID is not supported.
- M.2 x1 NVMe Non-RAID means the M.2 SATA/NVMe adapter (4Y37A09738) with NVMe drives. RAID is not supported.
- M.2 x4 SATA/NVMe Non-RAID means the M.2 SATA/x4 NVMe adapter (4Y37A79663) with either SATA or NVMe drives. RAID is not supported.
- M.2 Integrated RAID means the M.2 NVMe RAID with Marvell controller (B8P9) or 7mm SATA/NVMe RAID with a Broadcom controller (BYFF). RAID-0 and RAID-1 are supported with the integrated RAID controller.
- M.2 x4 SATA + RAID 5350-8i means the M.2 SATA/x4 NVMe adapter (4Y37A79663) with SATA drives. RAID is supported with the addition of the RAID 5350-8i adapter in a rear slot.
- M.2 x4 NVMe + RAID 540-8i means the M.2 SATA/x4 NVMe adapter (4Y37A79663) with NVMe drives. RAID is supported with the addition of the RAID 540-8i adapter in a rear slot.
Details - 2.5-inch front bays with front slots
The following table lists the detailed configurations that use 2.5-inch front drive bays without front PCIe slots.
Click to go back to the overview of 2.5-inch configurations with front slots.
Field upgrades
The SR635 V3 is orderable without drive bays, allowing you to add a backplane, cabling and controllers as field upgrades.
In this section:
- 2.5-inch, 3.5-inch and EDSFF field upgrades
- Upgrades to an Internal (CFF) HBA/RAID adapter
- 7mm drive bay field upgrades
- 2.5-inch drive bay fillers
2.5-inch, 3.5-inch and EDSFF field upgrades
Rear backplane kits included cables, however for front drive bays, the backplane kits do not include cables and must be ordered separately. The following table summarizes the option part numbers you will need to order for each available drive configuration.
For more information about the backplane kits and cable kits, see the Lenovo Server Options site:
https://serveroption.lenovo.com/cable_kit_options/
Tip: There is no upgrade path to add drive bays if the SR635 V3 already has a backplane, without removing the existing backplane. For example, you cannot upgrade a 4x 2.5-inch drive bay to 8 bays without first removing the existing backplane.
When adding drive bays, you will also need to add the appropriate storage controller(s). Consult the tables in the Storage configurations section to determine what controller sections are supported and what additional controllers you will need. Controllers are described in the Controllers for internal storage section.
Upgrades to an Internal (CFF) HBA/RAID adapter
If you want to add an internal (CFF) storage adapter (HBA, RAID adapter or SAS expander) to a configuration, you will need to order the cable kit as listed in the following table. Suitable upgrades are either replacing an existing adapter in a rear PCIe slot, or adding the CFF adapter to a server without any storage adapter installed.
The cable kit to order is listed in the following table.
7mm drive bay field upgrades
For field upgrades to add 7mm drive bays, order one of the part numbers listed in the following table.
RAID flash power module (supercap) support
If you plan to add one of the RAID adapters that includes a RAID flash power module (supercap) as a field upgrade, then you will also need to order a supercap installation kit for the power module. For CTO orders, the components in the installation kit are automatically derived when you select the RAID adapter.
The adapters that this applies to are as follows:
- Any supported RAID 9350 adapter
- Any supported RAID 940 adapter (including 940 adapters with external ports)
There are three possible locations for supercaps. Details are summarized in the following table. Location references are shown in the figure below.
* The server supports 3 supercaps when an Internal (CFF) RAID adapter is installed; with standard PCIe RAID adapters, the server only supports 2 supercaps
The locations where supercaps are installed is shown in the following figure.
Figure 12. Location of the supercaps in the SR635 V3
When adding a RAID adapter and supercap as a field upgrade, order the supercap installation kit list listed in the following table.
M.2 drives
The SR635 V3 supports one or two M.2 form-factor SATA or NVMe drives for use as an operating system boot solution or as additional storage.
The M.2 drives install into an M.2 module which is mounted horizontally in the server in front of the fans as shown in the Internal view of the server. In configurations with 2.5-inch front drive bays, the M.2 module is position between the drive bays and the fans.
The supported M.2 modules are listed in the following table. For field upgrades see the M.2 field upgrades section below.
ThinkSystem M.2 SATA/x4 NVMe 2-Bay Adapter (4Y37A79663) optionally supports RAID with the addition of a separate RAID adapter is required. For CTO orders, ordering information is listed in the following table to derive the required RAID adapter.
Configuration notes:
- M.2 is not supported with all storage configurations - see Storage configurations for details.
- For ThinkSystem M.2 SATA/NVMe 2-Bay Enablement Kit (4Y37A09738):
- RAID is not supported
- The installation of at least one M.2 drive is required. In the configurator, at least one M.2 drive must be selected
- For ThinkSystem M.2 SATA/x4 NVMe 2-Bay Adapter (4Y37A79663):
- The support of RAID-1 with the M.2 drives requires an additional RAID adapter that is installed in PCIe slot 1 or 2:
- RAID support for M.2 SATA drives requires a RAID 5350-8i adapter (feature BT7N)
- RAID support for M.2 NVMe drives requires a RAID 540-8i adapter operating in Tri-Mode (feature BT7P)
- The RAID adapter used for M.2 drive support cannot be configured for use with other drive bays (not even with 7mm)
- M.2 RAID and 7mm RAID are mutually exclusive: they are not supported together in the same configuration
- If RAID support is not required, the M.2 adapter connects to an onboard port. No additional adapter is required
- The adapter is not supported with EDSFF drive bay configurations due to physical limitations
- The support of RAID-1 with the M.2 drives requires an additional RAID adapter that is installed in PCIe slot 1 or 2:
- For ThinkSystem M.2 NVMe 2-Bay RAID Adapter (4Y37A09750):
- RAID is implemented using an onboard Marvell 88NR2241 NVMe RAID controller
- For ThinkSystem M.2 RAID B540i-2i SATA/NVMe Adapter (4Y37A90063):
- RAID is implemented using an onboard Broadcom controller
The ThinkSystem M.2 SATA/NVMe 2-Bay Enablement Kit has the following features:
- Supports one or two M.2 drives, either SATA or NVMe
- When two drives installed, they must be either both SATA or both NVMe
- Support 42mm, 60mm, 80mm and 110mm drive form factors (2242, 2260, 2280 and 22110)
- On the SR635 V3, no RAID support
- No onboard RAID; RAID functionality is provided by a separate adapter (SATA or NVMe)
- Either 6Gbps SATA or PCIe 3.0 x1 interface to the drives depending on the drives installed
- Supports monitoring and reporting of events and temperature through I2C
- Firmware update via Lenovo firmware update tools
- When connected to a separate PCIe RAID adapter, supports SED drive encryption via the RAID adapter, otherwise no SED support
The ThinkSystem M.2 SATA/x4 NVMe 2-Bay Adapter has the following features:
- Supports one or two M.2 drives, either SATA or NVMe
- When two drives installed, they must be either both SATA or both NVMe
- Support 42mm, 60mm, 80mm and 110mm drive form factors (2242, 2260, 2280 and 22110)
- No onboard RAID; RAID functionality is provided by a separate adapter (SATA or NVMe)
- Either 6Gbps SATA or PCIe 4.0 x4 interface to the drives depending on the drives installed
- Supports monitoring and reporting of events and temperature through I2C
- Firmware update via Lenovo firmware update tools
- When connected to a separate PCIe RAID adapter, supports SED drive encryption via the RAID adapter, otherwise no SED support
The ThinkSystem M.2 NVMe 2-Bay RAID Adapter (4Y37A09750) has the following features:
- Supports one or two NVMe M.2 drives
- Support 42mm, 60mm, 80mm and 110mm drive form factors (2242, 2260, 2280 and 22110)
- RAID support via an onboard Marvell 88NR2241 NVMe RAID Controller
- With 1 drive, supports single-drive RAID-0
- With 2 drives, supports 2-drive RAID-0, 2-drive RAID-1, or two single-drive RAID-0 arrays
- PCIe 3.0 x2 host interface; PCIe 3.0 x1 connection to each drive
- Management and configuration support via UEFI and OS-based tools
- Supports monitoring and reporting of events and temperature through I2C
- Firmware update via Lenovo firmware update tools
- No support for SED drive encryption
The ThinkSystem M.2 RAID B540i-2i SATA/NVMe Adapter (4Y37A90063) has the following features:
- Supports one or two M.2 drives, either SATA or NVMe
- Support 42mm, 60mm, 80mm and 110mm drive form factors (2242, 2260, 2280 and 22110)
- RAID support via an onboard Broadcom SAS3808N RAID Controller
- With 1 drive, supports JBOD
- With 2 drives, supports 2-drive RAID-0, 2-drive RAID-1, or JBOD
- PCIe 4.0 x2 host interface; PCIe 4.0 x1 connection to each drive
- Management and configuration support via UEFI and OS-based tools
- Supports monitoring and reporting of events and temperature
- Firmware update via Lenovo firmware update tools
- Supports SED drive encryption
M.2 field upgrades
For field upgrades, the SR635 V3 also requires additional cables necessary to connect the M.2 to either the system board or RAID adapter.
Ordering information is listed in the following table.
SED encryption key management with SKLM
The server supports self-encrypting drives (SEDs) as listed in the Internal drive options section. To effectively manage a large deployment of these drives in Lenovo servers, IBM Security Key Lifecycle Manager (SKLM) offers a centralized key management solution.
The IBM Security Key Lifecycle Manager software is available from Lenovo using the ordering information listed in the following table.
Controllers for internal storage
The SR635 V3 offers a variety of connectivity options for internal drives:
- For 2.5-inch drives:
- Onboard SATA ports (feature AVUX)
- Onboard NVMe ports (feature BC4V)
- RAID adapters and HBAs for SAS/SATA drives (PCIe slot-based)
- RAID adapters and HBAs for SAS/SATA drives (cabled in a dedicated space)
- For 7mm drive bays in the rear of the server (see the 7mm drives section)
- SATA controller integrated into the 7mm drive bay enclosure
- NVMe controller integrated into the 7mm drive bay enclosure
- For M.2 drives internal to the server (see M.2 drives section)
- SATA controller integrated on the M.2 adapters
- NVMe controller integrated on the M.2 adapters
As well as supporting RAID adapters and HBAs that install in a PCIe slot, the SR635 V3 with 2.5-inch front drive bays supports a custom form factor (CFF) adapter that is mounted in the server and cabled to one of the onboard NVMe ports.
The following table lists the adapters used for the internal storage of the server.
† Adapter also supports PCIe 4.0 x1 connectivity to NVMe drives (requires NVMe drives with U.3 interface)
** This adapter is currently not available for CTO orders; it is only available as an option part number for field upgrades
Configuration notes:
- Supercap support limits the number of RAID adapters installable: The table lists whether the adapter includes a power module (supercap) to power the flash memory. The server supports 2 supercaps as described in the RAID flash power module (supercap) support section. The number of supercaps supported also determines the maximum number of RAID adapters with flash that can be installed in the server.
- Field upgrades: If you are adding a RAID adapter with supercap to the server as a field upgrade, you may need a supercap holder as described in the RAID flash power module (supercap) support section.
- 7mm drive support: The storage adapters listed in the table below do not provide connectivity to the 7mm drive bays that are optionally available at the rear of the server. The 7mm drives have their own independent RAID controller. See the Rear 2.5-inch and 7mm drive bays section for details.
- E810 Ethernet and X350 RAID/HBAs: The use of both an Intel E810 network adapter and an X350 HBA/RAID adapter (9350, 5350 and 4350) is supported, however E810 firmware CVL4.3 or later is required. For details, see Support Tip HT513226.
The following rules apply to the X450 (4450, 5450 and 9450) HBA and RAID adapters:
- The X450 adapters support 24Gb SAS, however 24Gb backplanes and 24Gb SAS drives are required
- See the backplanes table in the Internal storage section to see which backplanes support 24Gb SAS
- If a 12Gb backplane is used, then the X450 adapters will only operate at up to 12Gb SAS
- 12Gb SAS drives will operate at up to 12Gb
- SATA drives will operate at up to 6Gb
- For specific adapter/backplane support in the SR635 V3, see the Storage configurations section
- The 4450 and 5450 adapters only support SAS/SATA drives; NVMe drives are not supported
- 9450-8i NVMe support:
- U.2 drive support is planned for mid-2025, up to 2 drives
- U.2 drives will have a PCIe x4 connection between the drives and adapter
- 9450-16i NVMe support:
- U.2 NVMe drive support is planned for mid-2025, up to 4 drives
- U.2 drives will have a PCIe x4 connection between the drives and adapter
- 9450-32i NVMe support:
- U.2 NVMe drives are supported, up to 8 drives
- U.2 drives have a PCIe x4 connection between the drives and adapter
- Only the following NVMe drive families are currently supported with the 9450-32i:
- PM1733a Read Intensive family except 1.92TB and 30.72TB drive
- PM1743 Read Intensive family
- PM9A3 Read Intensive family except 15.36TB
- PS1010 Read Intensive family
- 6500 ION Read Intensive family
- P5800X Write Intensive family
Support for all other NVMe drives is planned for mid-2025.
- Based on how the adapters are cabled to the backplanes, the 9450 adapters will support either SAS/SATA or they will support U.2. SAS/SATA and U.2 cannot be attached to the same adapter concurrently
The onboard SATA controller has the following features:
- Controller integrated into the AMD processor
- JBOD only; no RAID support
- Supports up to 12 SATA drives in the SR635 V3
- Supports HDDs and SSDs; can be mixed
The onboard NVMe support has the following features:
- Controller integrated into the AMD processor
- Supports up to 16 NVMe drives direct connected to onboard ports
- Each drive has PCIe x4 host interface, up to PCIe Gen5 depending on the backplane and drive type
- Supports JBOD only - No RAID support
For specifications about the RAID adapters and HBAs supported by the SR635 V3, see the ThinkSystem RAID Adapter and HBA Reference, available from:
https://lenovopress.lenovo.com/lp1288-thinksystem-raid-adapter-and-hba-reference#sr635-v3-support=SR635%2520V3
For more information about each of the adapters, see the product guides in the RAID adapters or HBA sections of the Lenovo Press web site:
https://lenovopress.com/servers/options/raid
https://lenovopress.com/servers/options/hba
RAID 940 Tri-Mode support
The RAID 940-8i and RAID 940-16i adapters also support NVMe through a feature named Tri-Mode support (or Trimode support). This feature enables the use of NVMe U.3 drives at the same time as SAS and SATA drives. Tri-Mode requires an AnyBay backplane. Cabling of the controller to the backplanes is the same as with SAS/SATA drives, and the NVMe drives are connected via a PCIe x1 link to the controller.
NVMe drives connected using Tri-Mode support provide better performance than SAS or SATA drives: A SATA SSD has a data rate of 6Gbps, a SAS SSD has a data rate of 12Gbps, whereas an NVMe U.3 Gen 4 SSD with a PCIe x1 link will have a data rate of 16Gbps. NVMe drives typically also have lower latency and higher IOPS compared to SAS and SATA drives. Tri-Mode is supported with U.3 NVMe drives and requires an AnyBay backplane.
Tri-Mode requires U.3 drives: Only NVMe drives with a U.3 interface are supported. U.2 drives are not supported. See the Internal drive options section for the U.3 drives supported by the server.
Internal drive options
The following tables list the drive options for internal storage of the server.
2.5-inch hot-swap drives:
- 2.5-inch hot-swap 12 Gb SAS HDDs
- 2.5-inch hot-swap 24 Gb SAS SSDs
- 2.5-inch hot-swap 12 Gb SAS SSDs
- 2.5-inch hot-swap 6 Gb SATA SSDs
- 2.5-inch hot-swap PCIe 5.0 NVMe SSDs
- 2.5-inch hot-swap PCIe 4.0 NVMe SSDs
2.5-inch 7mm hot-swap drives:
EDSFF hot-swap drives:
M.2 drives:
M.2 drive support: The use of M.2 drives requires an additional adapter as described in the M.2 drives subsection.
SED support: The tables include a column to indicate which drives support SED encryption. The encryption functionality can be disabled if needed. Note: Not all SED-enabled drives have "SED" in the description.
Internal backup units
The server does not supports any internal backup units, such as tape drives or RDX drives. External backup units are available as described in the External backup units section.
Optical drives
The server supports the external USB optical drive listed in the following table.
| Part number | Feature code | Description |
|---|---|---|
| 7XA7A05926 | AVV8 | ThinkSystem External USB DVD RW Optical Disk Drive |
The drive is based on the Lenovo Slim DVD Burner DB65 drive and supports the following formats: DVD-RAM, DVD-RW, DVD+RW, DVD+R, DVD-R, DVD-ROM, DVD-R DL, CD-RW, CD-R, CD-ROM.
I/O expansion
The SR635 V3 supports a total of up to 5x PCIe slots, 3x at the rear and 2x at the front, plus 1x OCP 3.0 SFF slot for networking. The OCP slot can be either at the front or rear. Slot availability is based on riser selection and drive bays configured.
Topics in this section:
Rear slots
The following figure shows the locations of the rear-accessible and front-accessible slots for each configuration selection. The OCP slot is located below the PCIe slots.
Figure 13. SR635 V3 slot configurations
The rear-accessible slots and riser cards are as follows:
- Riser 1: Slots 1 & 2
- Slot 1: Low Profile, PCIe x16
- Slot 2: Low Profile or FHHL, PCIe x16 (only in configuration A, B, and E in the above figure)
- Riser 2: Slot 3
- Slot 3: Low Profile or FHHL, PCIe x16 (only in configuration A and C)
Depending on the riser selected, the slots are either PCIe Gen4 or PCIe Gen5. Some configurations are only available with Gen4 slots.
The following table lists the configuration and ordering information for the PCIe slots in the SR635 V3. The Cfg column matches the slot configurations shown in the preceding figure. The table is divided up into configurations with Gen5 slots with Gen4, and configurations with only Gen4 slots. Ordering information is as follows:
- For CTO orders, order the feature codes listed for the configuration, both riser and cage feature codes (2 or 4 feature codes, depending on the configuration)
- For field upgrades, order the part numbers listed for the configuration (1 or 2 part numbers, depending on the configuration). The part numbers include both the risers and cages needed for that configuration.
It is also possible to build a configuration without any slots, in which case slot fillers will be derived in the configurator. Slots can be added later as field upgrades using option part numbers as listed in the table.
Maximum 2x Gen5 slots: The maximum number of PCIe Gen5 slots is 2. It is not currently possible to configure 3x PCIe Gen5 low-profile slots.
Configuration rules:
- For best performance, install PCIe 5.0 adapters in PCIe 5.0 (Gen5) slots
Front slots
As an addition or alternative to the rear slots, the SR635 V3 supports slots at the front of the server.
The following figure shows the locations of the front-accessible slots.
Figure 14. SR635 V3 front slots
The front-accessible slots and riser cards are as follows:
- Slot 4: Low Profile, PCIe 4.0 x16
- Slot 5: FHHL, PCIe 4.0 x16
- Slot 6: OCP 3.0 slot (PCIe 4.0 x16)
Ordering information is listed in the following table.
Configuration notes:
- The use of front slots requires Base feature code BQ7M as described in the Base feature codes section
- Front slots can be used in conjunction with rear drive bays. See the table of configurations in the Overview - 2.5-inch front bays with front slots section for specifics.
- The following front risers are currently not supported with 4th Gen AMD EPYC processors:
- ThinkSystem SR630 V3/SR635 V3 1X16 LP FL Front PCIe Gen5 Riser, feature C1PR
- ThinkSystem V3 1U 1X16 FHFL FR Front PCIe Gen5 Riser, feature C1PQ
- The front OCP slot is automatically derived by the configurator with riser 4 (slot 5)
- The front and rear OCP slots are mutually exclusive; when the front OCP slot is configured, the rear OCP slot is disconnected
- The use of the closed-loop liquid-cooled processor heatsink is not supported
- The use of the security bezel is not supported
Serial port
The SR635 V3 optionally supports a RS-232 serial port by adding a COM port bracket to slot 3. Ordering information is shown in the following table.
No front slot support: The serial port is not supported in the front PCIe slots
| Part number | Feature code | Description |
|---|---|---|
| 4X97A82921 | BMNJ | ThinkSystem V2/V3 1U COM Port Upgrade Kit |
The bracket is shown in the following figure. The option part number includes both Low Profile and Full Height brackets.
OCP slot filler
If customers or partners remove an OCP adapter from the server, we recommend that a slot cover (slot filler) be installed in its place to ensure proper airflow in the server. Ordering information is listed in the following table.
Tip: For CTO orders and preconfigured models, slot fillers are automatically installed in slots where an OCP adapter is not installed.
Network adapters
The server has a dedicated OCP 3.0 SFF slot with PCIe 5.0 x16 host interface. See Figure 3 for the location of the OCP slot. If front slots are configured, the OCP slot is instead located at the front of the server. Only 1 OCP card can be installed in the server.
The following table lists the supported OCP adapters. One port can optionally be shared with the XCC management processor for Wake-on-LAN and NC-SI support.
The following table lists additional supported network adapters that can be installed in the regular PCIe slots.
† In the SR635 V3, this adapter requires a full-height bracket and must be installed in a full-height slot. The use of a low-profile bracket and slot is not supported.
§ Not supported installed in slot 1 of the LP+FH riser cage (configuration B in the I/O expansion section)
For more information, including the transceivers and cables that each adapter supports, see the list of Lenovo Press Product Guides in the Networking adapters category:
https://lenovopress.com/servers/options/ethernet
Configuration rules:
- The following adapters are not supported installed into LP+FH riser cage (configuration B in the I/O expansion section)
- ThinkSystem Broadcom 5719 1GbE RJ45 4-Port PCIe Ethernet Adapter, 7ZT7A00484
- ThinkSystem I350-T4 PCIe 1Gb 4-Port RJ45 Ethernet Adapter, 7ZT7A00535
- ThinkSystem Broadcom 57454 10GBASE-T 4-port PCIe Ethernet Adapter, 4XC7A08245
- E810 Ethernet and X350 RAID/HBAs: The use of both an Intel E810 network adapter and an X350 HBA/RAID adapter (9350, 5350 and 4350) is supported, however E810 firmware CVL4.3 or later is required. For details, see Support Tip HT513226.
Fibre Channel host bus adapters
The following table lists the Fibre Channel HBAs supported by the SR635 V3.
No Windows 10/11 support: None of the adapters listed in the table are supported with Windows 10 or Windows 11.
For more information, see the list of Lenovo Press Product Guides in the Host bus adapters category:
https://lenovopress.com/servers/options/hba
SAS adapters for external storage
The following table lists SAS HBAs and RAID adapters supported by SR635 V3 server for use with external storage.
No Windows 10/11 support: None of the adapters listed in the table are supported with Windows 10 or Windows 11.
* See configuration rules below regarding supercap requirements
For a comparison of the functions of the supported storage adapters, see the ThinkSystem RAID Adapter and HBA Reference:
https://lenovopress.lenovo.com/lp1288#sr635-v3-support=SR635%2520V3&internal-or-external-ports=External
Configuration rules
- The RAID 940-8e uses a flash power module (supercap), and the SR635 V3 supports only 2 supercaps depending on the configuration. See the RAID flash power module (supercap) support section for details.
https://lenovopress.com/servers/options/hba
https://lenovopress.com/servers/options/raid
GPU adapters
The SR635 V3 supports the following graphics processing units (GPUs).
Controlled GPU: The NVIDIA L4 GPU is controlled which means the GPU is not offered in certain markets, as determined by the US Government. See the Models section on how to order controlled GPUs.
* See NVIDIA L4 configuration rule below
For information about these GPUs, see the ThinkSystem GPU Summary, available at:
https://lenovopress.com/lp0768-thinksystem-thinkagile-gpu-summary
Configuration rules
The following configuration requirements must be met when installing GPUs:
- The table includes a Controlled GPU column. If a GPU is listed as Controlled, that means the GPU is not offered in certain markets, as determined by the US Government. If a GPU is listed as No, that means the GPU is not controlled and is available in all markets.
- GPUs can be configured in CTO orders as follows:
- A Controlled GPU can only be configured using one of the Base CTO models for Controlled GPUs, such as , as listed in the Models section.
- A GPU that is not controlled can only be configured using one of the Base CTO models that is not for Controlled GPUs, such as 7D9GCTO1WW, as listed in the Models section.
- All GPUs installed must be identical
- The use of 4x NVIDIA L4 GPUs requires the following riser cards (see I/O Expansion section):
- Slot 1: ThinkSystem SR645 V3/SR635 V3 x16 PCIe Gen5 Riser1, BLK7 (4XH7A86136)
- Slot 3: ThinkSystem V3 1U x16 PCIe Gen5 Riser2, BLKA (4XH7A86137)
- Slot 4: ThinkSystem SR630 V3/SR635 V3 1X16 LP FL Front PCIe Gen5 Riser, C1PR (CTO only)
- Slot 5: ThinkSystem V3 1U 1X16 FHFL FR Front PCIe Gen5 Riser, C1PQ (CTO only)
The use of 4x NVIDIA L4 GPUs is supported with 4th Gen and 5th Gen EPYC processors.
- Rear drive bays bays are not supported
- Flash storage adapters are not supported.
- Maximum ambient temperature is 30°C
- Performance fans are required and will be derived by the configurator for configure-to-order builds.
- When adding GPUs as field upgrades, you will be required to replace all Standard fans with Performance fans. See the Cooling section for ordering information.
- Some NVIDIA A Series GPUs are available as two feature codes, one with a CEC chip and one without a CEC chip (ones without the CEC chip have "w/o CEC" in the name). The CEC is a secondary Hardware Root of Trust (RoT) module that provides an additional layer of security, which can be used by customers who have high regulatory requirements or high security standards. NVIDIA uses a multi-layered security model and hence the protection offered by the primary Root of Trust embedded in the GPU is expected to be sufficient for most customers. The CEC defeatured products still offer Secure Boot, Secure Firmware Update, Firmware Rollback Protection, and In-Band Firmware Update Disable. Specifically, without the CEC chip, the GPU does not support Key Revocation or Firmware Attestation. CEC and non-CEC GPUs of the same type of GPU can be mixed in field upgrades.
Cooling
The SR635 V3 server has up to seven 40 mm dual-rotor hot-swap variable-speed fans. Five, six or seven fans are required depending on the configuration of the server. System fans are either Standard fans (21K RPM, dual-rotor) or Performance fans (28K RPM, dual-rotor), depending on the configuration. The server offers N+1 rotor redundancy.
The server also has one additional fan integrated in each of the two power supplies.
Most configurations require 6 performance fans.
The following configuration requires 7 fans:
- EDSFF drive bays + (OCP adapter or GPUs or adapter in slot 1)
- Front PCIe slots
Five fans are sufficient for the following configuration (all must apply):
- 10x 2.5-inch chassis (no front PCIe slots, no EDSFF)
- No OCP adapter
- No adapter in PCIe slot 1
- No GPUs installed
- No rear drive bays
Most configurations require performance fans. Standard fans are sufficient for the following configuration (all must apply):
- 10x 2.5-inch chassis (no front PCIe slots, no EDSFF)
- CPU < 240W TDP
- No rear drives
- No GPUs
- No networking ≥ 100GbE
For additional information, see the Thermal rules page for the SR635 V3 on the Lenovo documentation site:
http://pubs.lenovo.com/sr635-v3/thermal_rules
Ordering information for the fans is listed in the following table.
Power supplies
The SR635 V3 supports up to two redundant hot-swap power supplies.
The power supply choices are listed in the following table. Both power supplies used in server must be identical.
Tip: When configuring a server in the DCSC configurator, power consumption is calculated precisely by interfacing with Lenovo Capacity Planner. You can therefore select the appropriate power supply for your configuration. However, do consider future upgrades that may require additional power needs.
Supported power supplies are auto-sensing dual-voltage units, supporting both 110V AC (100-127V 50/60 Hz) and 220V AC (200-240V 50/60 Hz) power. For China customers, all power supplies support 240V DC. All supported AC power supplies have a C14 connector.
The supported -48V DC power supply has a Weidmuller TOP 4GS/3 7.6 terminal as shown in the following figure.
Figure 16. Connector on the ThinkSystem 1100W -48V DC Hot-Swap Gen2 Power Supply
Power supply options do not include a line cord. For server configurations, the inclusion of a power cord is model dependent. Configure-to-order models can be configured without power cords if desired.
Power supply LEDs
The supported hot-swap power supplies have the following LEDs:
- Power input LED:
- Green: The power supply is connected to the AC power source
- Off: The power supply is disconnected from the AC power source or a power problem has occurred
- Power output LED:
- Green: The server is on and the power supply is working normally
- Blinking green: The power supply is in Zero-output/Standby mode (see below)
- Off: The server is powered off, or the power supply is not working properly
- Power supply error LED:
- Off: The power supply is working normally
- Yellow: The power supply has failed
Power cords
Line cords and rack power cables with C13 connectors can be ordered as listed in the following table.
115V customers: If you plan to use the 1100W power supply with a low-range (100-127V) power source, select a power cable that is rated above 10A. Power cables that are rated at 10A or below are not supported with low-range power.
Systems management
The SR635 V3 contains an integrated service processor, XClarity Controller 2 (XCC), which provides advanced control, monitoring, and alerting functions. The XCC2 is based on the AST2600 baseboard management controller (BMC) using a dual-core ARM Cortex A7 32-bit RISC service processor running at 1.2 GHz.
Topics in this section:
System I/O Board
The SR635 V3 implements a separate System I/O Board that connects to the Processor Board. The location of the System I/O Board is shown in the Components and connectors section. The System I/O Board contains all the connectors visible at the rear of the server as shown in the following figure.
The board also has the following components:
- XClarity Controller 2, implemented using the ASPEED AST2600 baseboard management controller (BMC).
- Root of Trust (RoT) module - a daughter card that implements Platform Firmware Resiliency (PFR) hardware Root of Trust (RoT) which enables the server to be NIST SP800-193 compliant. For more details about PFR, see the Security section.
- Connector to enable an additional redundant Ethernet connection to the XCC2 controller. The connector is used in conjunction with the ThinkSystem V3 Management NIC Adapter Kit (4XC7A85319). For details, see the Remote management section.
- Internal USB port - to allow the booting of an operating system from a USB key. The VMware ESXi preloads use this port for example. Preloads are described in the Operating system support section.
- MicroSD card port to enable the use of a MicroSD card for additional storage for use with the XCC2 controller. XCC2 can use the storage as a Remote Disc on Card (RDOC) device (up to 4GB of storage). It can also be used to store firmware updates (including N-1 firmware history) for ease of deployment.
Tip: Without a MicroSD card installed, the XCC2 controller will have 100MB of available RDOC storage.
Ordering information for the supported USB drive and Micro SD card are listed in the following table.
Local management
The SR635 V3 offers a front operator panel with key LED status indicators, as shown in the following figure.
Tip: The Network LED only shows network activity of the installed OCP network adapter.
Figure 18. Front operator panel
Light path diagnostics
The server offers light path diagnostics. If an environmental condition exceeds a threshold or if a system component fails, the XCC lights LEDs inside the server to help you diagnose the problem and find the failing part. The server has fault LEDs next to the following components:
- Each memory DIMM
- Each drive bay
- Each power supply
Integrated Diagnostics Panel for 8x 2.5-inch and EDSFF configurations
For configurations with 8x 2.5-inch drive bays or 16x EDSFF drive bays at the front, the server can optionally be configured to have a pull-out Integrated Diagnostics Panel. The following figure shows the configurations with the standard (fixed) operator panel and the optional Integrated Diagnostics Panel.
Figure 19. Operator panel choices for the EDSFF and 8x 2.5-inch drive bay configurations
The Integrated Diagnostics Panel allows quick access to system status, firmware, network, and health information. The LCD display on the panel and the function buttons give you access to the following information:
- Active alerts
- Status Dashboard
- System VPD: machine type & mode, serial number, UUID string
- System firmware levels: UEFI and XCC firmware
- XCC network information: hostname, MAC address, IP address, DNS addresses
- Environmental data: Ambient temperature, CPU temperature, AC input voltage, estimated power consumption
- Active XCC sessions
- System reset action
The Integrated Diagnostics Panel can be configured as listed in the following table. It is only available configure-to-order (CTO); not available as a field upgrade.
Configuration rules for the Pull-out operator panel:
- Only supported with configurations with 8x 2.5-inch drive bays or with EDSFF drive bays
- Not available as a field upgrade. The component is CTO or on pre-configured models only
Front VGA and External Diagnostics ports
The VGA port at the rear of the server is included in all models, however the VGA port at the front of the server is optional. The ThinkSystem V2/V3 1U Front VGA Cable Option Kit allows you to upgrade your server by adding a VGA video port to the front of the server (if the server does not already come with a front VGA port). When the front VGA is in use, the rear VGA port is automatically disabled.
The SR635 V3 optionally includes a port to connect an External Diagnostics Handset. To include in a server, ensure the appropriate feature code is included, based on the front drive configuration. Field upgrades to add the External Diagnostics port are not available.
External Diagnostics Handset
The SR635 V3 optionally includes a port to connect an External Diagnostics Handset as described in the previous section. The External Diagnostics Handset has the same functions as the Integrated Diagnostics Panel but has the advantages of not consuming space on the front of the server plus it can be shared among many servers in your data center. The handset has a magnet on the back of it to allow you to easily mount it on a convenient place on any rack cabinet.
Figure 20. External Diagnostics Handset
The following table lists the ordering information for the handset.
| Part number | Feature code | Description |
|---|---|---|
| 4TA7A64874 | BEUX | ThinkSystem External Diagnostics Handset |
Information pull-out tab
The front of the server also houses an information pull-out tab (also known as the network access tag). See Figure 2 for the location. A label on the tab shows the network information (MAC address and other data) to remotely access the service processor.
System status with XClarity Mobile
The XClarity Mobile app includes a tethering function where you can connect your Android or iOS device to the server via USB to see the status of the server.
The steps to connect the mobile device are as follows:
- Enable USB Management on the server, by holding down the ID button for 3 seconds (or pressing the dedicated USB management button if one is present)
- Connect the mobile device via a USB cable to the server's USB port with the management symbol
- In iOS or Android settings, enable Personal Hotspot or USB Tethering
- Launch the Lenovo XClarity Mobile app
Once connected you can see the following information:
- Server status including error logs (read only, no login required)
- Server management functions (XClarity login credentials required)
Remote management
The server offers a dedicated RJ45 Ethernet port at the rear of the server for remote management via the XClarity Controller 2 management processor. The port supports 10/100/1000 Mbps speeds.
Remote server management is provided through industry-standard interfaces:
- Intelligent Platform Management Interface (IPMI) Version 2.0
- Simple Network Management Protocol (SNMP) Version 3 (no SET commands; no SNMP v1)
- Common Information Model (CIM-XML)
- Representational State Transfer (REST) support
- Redfish support (DMTF compliant)
- Web browser - HTML 5-based browser interface (Java and ActiveX not required) using a responsive design (content optimized for device being used - laptop, tablet, phone) with NLS support
The SR635 V3 also supports the use of an OCP adapter that provides an additional redundant Ethernet connection to the XCC2 controller. Ordering information is listed in the following table.
| Part number |
Feature code |
Description | Maximum quantity |
|---|---|---|---|
| 4XC7A85319 | BTMQ | ThinkSystem V3 Management NIC Adapter Kit | 1 |
The use of this adapter allows concurrent remote access using both the connection on the adapter and the onboard RJ45 remote management port provided by the server. The adapter and onboard port have separate IP addresses.
Configuration rules:
- The Redundant System Management Port Adapter is installed in the OCP adapter slot at the rear of the server and is mutually exclusive with any OCP network adapter.
- It is not supported installed in the front OCP slot (if the front OCP slot is configured)
- If the Redundant System Management Port Adapter is installed in the rear slot, then the front OCP slot (if configured) cannot be used.
The following figure shows the server with the Redundant System Management Port Adapter installed in the OCP slot.
Figure 21. SR635 V3 with the Redundant System Management Port Adapter installed
IPMI via the Ethernet port (IPMI over LAN) is supported, however it is disabled by default. For CTO orders you can specify whether you want to the feature enabled or disabled in the factory, using the feature codes listed in the following table.
XCC2 Platinum
The XCC2 service processor in the SR635 V3 supports an upgrade to the Platinum level of features. Compared to the XCC functions of ThinkSystem V2 and earlier systems, Platinum adds the same features as Enterprise and Advanced levels in ThinkSystem V2, plus additional features.
XCC2 Platinum adds the following Enterprise and Advanced functions:
- Remotely viewing video with graphics resolutions up to 1600x1200 at 75 Hz with up to 23 bits per pixel, regardless of the system state
- Remotely accessing the server using the keyboard and mouse from a remote client
- International keyboard mapping support
- Syslog alerting
- Redirecting serial console via SSH
- Component replacement log (Maintenance History log)
- Access restriction (IP address blocking)
- Lenovo SED security key management
- Displaying graphics for real-time and historical power usage data and temperature
- Boot video capture and crash video capture
- Virtual console collaboration - Ability for up to 6 remote users to be log into the remote session simultaneously
- Remote console Java client
- Mapping the ISO and image files located on the local client as virtual drives for use by the server
- Mounting the remote ISO and image files via HTTPS, SFTP, CIFS, and NFS
- System utilization data and graphic view
- Single sign on with Lenovo XClarity Administrator
- Update firmware from a repository
- License for XClarity Energy Manager
Note: The SR635 V3 does not support Power capping.
XCC2 Platinum also adds the following features that are new to XCC2:
- System Guard - Monitor hardware inventory for unexpected component changes, and simply log the event or prevent booting
- Enterprise Strict Security mode - Enforces CNSA 1.0 level security
- Neighbor Group - Enables administrators to manage and synchronize configurations and firmware level across multiple servers
Ordering information is listed in the following table. XCC2 Platinum is a software license upgrade - no additional hardware is required.
| Part number | Feature code | Description |
|---|---|---|
| 7S0X000DWW | S91X | Lenovo XClarity XCC2 Platinum Upgrade |
| 7S0X000KWW | SBCV | Lenovo XClarity Controller 2 (XCC2) Platinum Upgrade |
With XCC2 Platinum, for CTO orders, you can request that System Guard be enabled in the factory and the first configuration snapshot be recorded. To add this to an order, select feature code listed in the following table. The selection is made in the Security tab of the DCSC configurator.
| Feature code | Description |
|---|---|
| BUT2 | Install System Guard |
For more information about System Guard, see https://pubs.lenovo.com/xcc2/NN1ia_c_systemguard
Lenovo XClarity Provisioning Manager
Lenovo XClarity Provisioning Manager (LXPM) is a UEFI-based application embedded in ThinkSystem servers and accessible via the F1 key during system boot.
LXPM provides the following functions:
- Graphical UEFI Setup
- System inventory information and VPD update
- System firmware updates (UEFI and XCC)
- RAID setup wizard
- OS installation wizard (including unattended OS installation)
- Diagnostics functions
Lenovo XClarity One
Lenovo XClarity One is a hybrid cloud-based unified Management-as-a-Service (MaaS) platform, built for growing enterprises. XClarity One is powered by Lenovo Smarter Support, a powerful AI-driven platform that leverages predictive analytics to enhance the performance, reliability, and overall efficiency of Lenovo servers.
XClarity One is the next milestone in Lenovo’s portfolio of systems management products. Now you can leverage the benefits of a true next-generation, hybrid cloud-based solution for the deployment, management, and maintenance of your infrastructure through a single, centralized platform that delivers a consistent user experience across all Lenovo products.
Key features include:
- AI-powered Automation
Harnesses the power of AI and predictive analytics to enhance the performance and reliability of your infrastructure with proactive protection.
- AI-Powered Predictive Failure Analytics - predict maintenance needs before the failure occurs, with the ability to visualize aggregated actions in customer dashboard.
- AI-Powered Call-Home - A Call-Home serviceable event opens a support ticket automatically, leveraging AI technology for problem determination and fast resolution.
- AI-Powered Premier Support with Auto CRU - uses AI to automatically dispatch parts and services, reducing service costs and minimizing downtime.
- Secure Management Hub
Lenovo’s proprietary Management Hub is an on-premises virtual appliance that acts as the bridge between your infrastructure and the cloud.
- On-Premises Security with Cloud Flexibility - your infrastructure has no direct connection to the cloud, greatly reducing your attack surface from external threats while still having the deployment benefits, flexibility, and scalability of a cloud solution.
- Authentication and Authorization - built on a Zero Trust Architecture and requiring OTP Application authentication for all users to handle the support of all customers’ servers and client devices. Role-based access controls help define and restrict permissions based on user roles.
- AI-Powered Management
Go beyond standard system management leveraging AI algorithms to continuously learn from data patterns to optimize performance and predict potential issues before they impact operations.
- AI Customizable Insights and Reporting - Customize AI-generated insights and reports to align with specific business objectives, enabling data-driven decision-making and strategic planning.
- AI-driven scalability and flexibility - Guided with AI-driven predictions, the platform supports dynamic scaling of resources based on workload demands.
- Monitor and Change - AI Advanced analytics capabilities providing deep insights into server performance, resource utilization, and security threats, to detect anomalies and suggest optimizations in real-time. NLP capabilities enabling administrators to interact with the platform using voice commands or text queries.
- Upward Integration - Integrated with Lenovo Open Cloud Automation (LOC-A), Lenovo Intelligent Computer Orchestration (LiCO) and AIOps engines providing an end-to-end management architecture across Lenovo infrastructure and devices solutions.
- Cross-Platform Compatibility - Compatibility across different server types and cloud environments
Lenovo XClarity One is an optional management component. License information for XClarity One is listed in the following table.
For more information, see these resources:
- Lenovo XClarity One datasheet:
https://lenovopress.lenovo.com/ds0188-lenovo-xclarity-one - Lenovo XClarity One product guide:
https://lenovopress.lenovo.com/lp1992-lenovo-xclarity-one
Lenovo XClarity Administrator
Lenovo XClarity Administrator is a centralized resource management solution designed to reduce complexity, speed response, and enhance the availability of Lenovo systems and solutions. It provides agent-free hardware management for ThinkSystem servers. The administration dashboard is based on HTML 5 and allows fast location of resources so tasks can be run quickly.
Because Lenovo XClarity Administrator does not require any agent software to be installed on the managed endpoints, there are no CPU cycles spent on agent execution, and no memory is used, which means that up to 1GB of RAM and 1 - 2% CPU usage is saved, compared to a typical managed system where an agent is required.
Lenovo XClarity Administrator is an optional software component for the SR635 V3. The software can be downloaded and used at no charge to discover and monitor the SR635 V3 and to manage firmware upgrades.
If software support is required for Lenovo XClarity Administrator, or premium features such as configuration management and operating system deployment are required, Lenovo XClarity Pro software subscription should be ordered. Lenovo XClarity Pro is licensed on a per managed system basis, that is, each managed Lenovo system requires a license.
The following table lists the Lenovo XClarity software license options.
Lenovo XClarity Administrator offers the following standard features that are available at no charge:
- Auto-discovery and monitoring of Lenovo systems
- Firmware updates and compliance enforcement
- External alerts and notifications via SNMP traps, syslog remote logging, and e-mail
- Secure connections to managed endpoints
- NIST 800-131A or FIPS 140-3 compliant cryptographic standards between the management solution and managed endpoints
- Integration into existing higher-level management systems such as cloud automation and orchestration tools through REST APIs, providing extensive external visibility and control over hardware resources
- An intuitive, easy-to-use GUI
- Scripting with Windows PowerShell, providing command-line visibility and control over hardware resources
Lenovo XClarity Administrator offers the following premium features that require an optional Pro license:
- Pattern-based configuration management that allows to define configurations once and apply repeatedly without errors when deploying new servers or redeploying existing servers without disrupting the fabric
- Bare-metal deployment of operating systems and hypervisors to streamline infrastructure provisioning
For more information, refer to the Lenovo XClarity Administrator Product Guide:
http://lenovopress.com/tips1200
Lenovo XClarity Integrators
Lenovo also offers software plug-in modules, Lenovo XClarity Integrators, to manage physical infrastructure from leading external virtualization management software tools including those from Microsoft and VMware.
These integrators are offered at no charge, however if software support is required, a Lenovo XClarity Pro software subscription license should be ordered.
Lenovo XClarity Integrators offer the following additional features:
- Ability to discover, manage, and monitor Lenovo server hardware from VMware vCenter or Microsoft System Center
- Deployment of firmware updates and configuration patterns to Lenovo x86 rack servers and Flex System from the virtualization management tool
- Non-disruptive server maintenance in clustered environments that reduces workload downtime by dynamically migrating workloads from affected hosts during rolling server updates or reboots
- Greater service level uptime and assurance in clustered environments during unplanned hardware events by dynamically triggering workload migration from impacted hosts when impending hardware failures are predicted
For more information about all the available Lenovo XClarity Integrators, see the Lenovo XClarity Administrator Product Guide: https://lenovopress.com/tips1200-lenovo-xclarity-administrator
Lenovo XClarity Essentials
Lenovo offers the following XClarity Essentials software tools that can help you set up, use, and maintain the server at no additional cost:
- Lenovo Essentials OneCLI
OneCLI is a collection of server management tools that uses a command line interface program to manage firmware, hardware, and operating systems. It provides functions to collect full system health information (including health status), configure system settings, and update system firmware and drivers.
- Lenovo Essentials UpdateXpress
The UpdateXpress tool is a standalone GUI application for firmware and device driver updates that enables you to maintain your server firmware and device drivers up-to-date and help you avoid unnecessary server outages. The tool acquires and deploys individual updates and UpdateXpress System Packs (UXSPs) which are integration-tested bundles.
- Lenovo Essentials Bootable Media Creator
The Bootable Media Creator (BOMC) tool is used to create bootable media for offline firmware update.
For more information and downloads, visit the Lenovo XClarity Essentials web page:
http://support.lenovo.com/us/en/documents/LNVO-center
Lenovo XClarity Energy Manager
Lenovo XClarity Energy Manager (LXEM) is a power and temperature management solution for data centers. It is an agent-free, web-based console that enables you to monitor and manage power consumption and temperature in your data center through the management console.
LXEM is a licensed product. A single-node LXEM license is included with the XClarity Controller Platinum upgrade as described in the XCC2 Platinum section. If your server does not have the XCC Platinum upgrade, Energy Manager licenses can be ordered as shown in the following table.
| Part number | Description |
|---|---|
| 4L40E51621 | Lenovo XClarity Energy Manager Node License (1 license needed per server) |
Note: The SR635 V3 does not support the following Energy Manager functions:
- Power capping
- Policy-based management
For more information about XClarity Energy Manager, see the following resources:
- Lenovo Support page:
https://datacentersupport.lenovo.com/us/en/solutions/lnvo-lxem - User Guide for XClarity Energy Manager:
https://pubs.lenovo.com/lxem/
Lenovo Capacity Planner
Lenovo Capacity Planner is a power consumption evaluation tool that enhances data center planning by enabling IT administrators and pre-sales professionals to understand various power characteristics of racks, servers, and other devices. Capacity Planner can dynamically calculate the power consumption, current, British Thermal Unit (BTU), and volt-ampere (VA) rating at the rack level, improving the planning efficiency for large scale deployments.
For more information, refer to the Capacity Planner web page:
http://datacentersupport.lenovo.com/us/en/solutions/lnvo-lcp
Security
Topics in this section:
Security features
The SR635 V3 server offers the following electronic security features:
- Secure Boot function of the AMD EPYC processor
- Support for Platform Firmware Resiliency (PFR) hardware Root of Trust (RoT) - see the Platform Firmware Resiliency section
- Firmware signature processes compliant with FIPS and NIST requirements
- System Guard (part of XCC Platinum) - Proactive monitoring of hardware inventory for unexpected component changes
- Administrator and power-on password
- Integrated Trusted Platform Module (TPM) supporting TPM 2.0
- Self-encrypting drives (SEDs) with support for enterprise key managers - see the SED encryption key management section
The server is NIST SP 800-147B compliant.
The SR635 V3 server also offers the following optional physical security features:
- Optional chassis intrusion switch
- Optional lockable front security bezel
The optional lockable front security bezel is shown in the following figure and includes a key that enables you to secure the bezel over the drives and system controls thereby reducing the chance of unauthorized or accidental access to the server.
Front PCIe slots: The use of the security bezel is not supported when the server has front PCIe slots.
Figure 22. Lockable front security bezel
The dimensions of the security bezel are:
- Width: 437 mm (17.2 in.)
- Height: 43 mm (1.3 in.)
- Width: 23 mm (0.9 in.)
The following table lists the physical security options for the SR635 V3.
Tip: The only difference between security bezels 4XH7A09890 and 4XH7A90346 is the Lenovo logo: On 4XH7A09890, the logo is made from plastic; on 4XH7A90346, the logo is made from aluminum alloy.
Platform Firmware Resiliency - Lenovo ThinkShield
Lenovo's ThinkShield Security is a transparent and comprehensive approach to security that extends to all dimensions of our data center products: from development, to supply chain, and through the entire product lifecycle.
The ThinkSystem SR635 V3 includes Platform Firmware Resiliency (PFR) hardware Root of Trust (RoT) which enables the system to be NIST SP800-193 compliant. This offering further enhances key platform subsystem protections against unauthorized firmware updates and corruption, to restore firmware to an integral state, and to closely monitor firmware for possible compromise from cyber-attacks.
PFR operates upon the following server components:
- UEFI image – the low-level server firmware that connects the operating system to the server hardware
- XCC image – the management “engine” software that controls and reports on the server status separate from the server operating system
- FPGA image – the code that runs the server’s lowest level hardware controller on the motherboard
The Lenovo Platform Root of Trust Hardware performs the following three main functions:
- Detection – Measures the firmware and updates for authenticity
- Recovery – Recovers a corrupted image to a known-safe image
- Protection – Monitors the system to ensure the known-good firmware is not maliciously written
These enhanced protection capabilities are implemented using a dedicated, discrete security processor whose implementation has been rigorously validated by leading third-party security firms. Security evaluation results and design details are available for customer review – providing unprecedented transparency and assurance.
The SR635 V3 includes support for Secure Boot, a UEFI firmware security feature developed by the UEFI Consortium that ensures only immutable and signed software are loaded during the boot time. The use of Secure Boot helps prevent malicious code from being loaded and helps prevent attacks, such as the installation of rootkits. Lenovo offers the capability to enable secure boot in the factory, to ensure end-to-end protection. Alternatively, Secure Boot can be left disabled in the factory, allowing the customer to enable it themselves at a later point, if desired.
The following table lists the relevant feature code(s).
Tip: If Secure Boot is not enabled in the factory, it can be enabled later by the customer. However once Secure Boot is enabled, it cannot be disabled.
Security standards
The SR635 V3 supports the following security standards and capabilities:
- Industry Standard Security Capabilities
- AMD CPU Enablement
- AES-NI (Advanced Encryption Standard New Instructions)
- GMET (Guest Mode Execute Trap)
- Hardware-based side channel attack resilience enhancements
- NX (No eXecute)
- PSB (Platform Secure Boot)
- Shadow Stack
- SEV (Secure Encrypted Virtualization)
- SEV-ES (Encrypted State register encryption)
- SEV-SNP (Secure Nested Paging)
- SVM (Secure Virtual Machine)
- SME (Secure Memory Encryption)
- UMIP (User Mode Instruction Prevention)
- Microsoft Windows Security Enablement
- Credential Guard
- Device Guard
- Host Guardian Service
- TCG (Trusted Computing Group) TPM (Trusted Platform Module) 2.0
- UEFI (Unified Extensible Firmware Interface) Forum Secure Boot
- AMD CPU Enablement
- Hardware Root of Trust and Security
- Independent security subsystem providing platform-wide NIST SP800-193 compliant Platform Firmware Resilience (PFR)
- Host domain RoT supplemented by AMD Platform Secure Boot (PSB)
- Management domain RoT supplemented by the Secure Boot features of XCC
- Platform Security
- Boot and run-time firmware integrity monitoring with rollback to known-good firmware (e.g., “self-healing”)
- Non-volatile storage bus security monitoring and filtering
- Resilient firmware implementation, such as to detect and defeat unauthorized flash writes or SMM (System Management Mode) memory incursions
- Patented IPMI KCS channel privileged access authorization (USPTO Patent# 11,256,810)
- Host and management domain authorization, including integration with CyberArk for enterprise password management
- KMIP (Key Management Interoperability Protocol) compliant, including support for IBM SKLM and Thales KeySecure
- Reduced “out of box” attack surface
- Configurable network services
- FIPS 140-3 (in progress) validated cryptography for XCC
- CNSA Suite 1.0 Quantum-resistant cryptography for XCC
- Lenovo System Guard
For more information on platform security, see the paper “How to Harden the Security of your ThinkSystem Server and Management Applications” available from https://lenovopress.com/lp1260-how-to-harden-the-security-of-your-thinksystem-server.
- Standards Compliance and/or Support
- NIST SP800-131A rev 2 “Transitioning the Use of Cryptographic Algorithms and Key Lengths”
- NIST SP800-147B “BIOS Protection Guidelines for Servers”
- NIST SP800-193 “Platform Firmware Resiliency Guidelines”
- ISO/IEC 11889 “Trusted Platform Module Library”
- Common Criteria TCG Protection Profile for “PC Client Specific TPM 2.0”
- European Union Commission Regulation 2019/424 (“ErP Lot 9”) “Ecodesign Requirements for Servers and Data Storage Products” Secure Data Deletion
- Optional FIPS 140-2 validated Self-Encrypting Disks (SEDs) with external KMIP-based key management
- Product and Supply Chain Security
- Suppliers validated through Lenovo’s Trusted Supplier Program
- Developed in accordance with Lenovo’s Secure Development Lifecycle (LSDL)
- Continuous firmware security validation through automated testing, including static code analysis, dynamic network and web vulnerability testing, software composition analysis, and subsystem-specific testing, such as UEFI security configuration validation
- Ongoing security reviews by US-based security experts, with attestation letters available from our third-party security partners
- Digitally signed firmware, stored and built on US-based infrastructure and signed on US-based Hardware Security Modules (HSMs)
- TAA (Trade Agreements Act) compliant manufacturing, by default in Mexico for North American markets with additional US and EU manufacturing options
- US 2019 NDAA (National Defense Authorization Act) Section 889 compliant
Rack installation
The following table lists the rack installation options that are available for the SR635 V3.
For the specification of the rail kits, see the ThinkSystem and ThinkEdge Rail Kit Reference:
https://lenovopress.lenovo.com/lp1838-thinksystem-and-thinkedge-rail-kit-reference#sr635-v3-support=SR635%2520V3
Operating system support
The SR635 V3 with 5th Gen AMD EPYC processors supports the following operating systems:
- Microsoft Windows Server 2019
- Microsoft Windows Server 2022
- Microsoft Windows Server 2025
- Red Hat Enterprise Linux 8.10
- Red Hat Enterprise Linux 9.4
- Red Hat Enterprise Linux 9.5
- SUSE Linux Enterprise Server 15 SP6
- Ubuntu 22.04 LTS 64-bit
- Ubuntu 24.04 LTS 64-bit
- VMware ESXi 8.0 U3
- Windows 10 (x64)
- Windows 11
The SR635 V3 with 4th Gen AMD EPYC processors supports the following operating systems:
- Microsoft Windows Server 2019
- Microsoft Windows Server 2022
- Microsoft Windows Server 2025
- Red Hat Enterprise Linux 8.6
- Red Hat Enterprise Linux 8.7
- Red Hat Enterprise Linux 8.8
- Red Hat Enterprise Linux 8.9
- Red Hat Enterprise Linux 8.10
- Red Hat Enterprise Linux 9.0
- Red Hat Enterprise Linux 9.1
- Red Hat Enterprise Linux 9.2
- Red Hat Enterprise Linux 9.3
- Red Hat Enterprise Linux 9.4
- Red Hat Enterprise Linux 9.5
- SUSE Linux Enterprise Server 15 SP4
- SUSE Linux Enterprise Server 15 SP5
- SUSE Linux Enterprise Server 15 SP6
- SUSE Linux Enterprise Server 15 Xen SP4
- SUSE Linux Enterprise Server 15 Xen SP5
- Ubuntu 20.04 LTS 64-bit
- Ubuntu 22.04 LTS 64-bit
- Ubuntu 24.04 LTS 64-bit
- VMware ESXi 7.0 U3
- VMware ESXi 8.0
- VMware ESXi 8.0 U1
- VMware ESXi 8.0 U2
- VMware ESXi 8.0 U3
- Windows 10 (x64)
- Windows 11
For a complete list of supported, certified and tested operating systems, plus additional details and links to relevant web sites, see the Operating System Interoperability Guide:
For configure-to-order configurations, the SR635 V3 can be preloaded with VMware ESXi. Ordering information is listed in the following table.
Configuration rule:
- An ESXi preload cannot be selected if the configuration includes an NVIDIA GPU (ESXi preload cannot include the NVIDIA driver)
You can download supported VMware vSphere hypervisor images from the following web page and install it using the instructions provided:
https://vmware.lenovo.com/content/custom_iso/
Windows 10 and Windows 11
The SR635 V3 can now run Windows 10 and Windows 11, however only a subset of adapters and drives can be installed. For ease of configuration, additional Base CTO models 7D9GCTO2WW and 7D9HCTO2WW have been created to assist building a configuration that can be used with the client operating systems. See the Models section for details.
The XClarity management toolset is supported with Windows 10 and Windows 11.
Windows client license: A Windows client license for the system cannot be ordered from Lenovo nor can the OS be preloaded on the system in the factory. For the Windows license and for preloads, please contact your Lenovo business partner. A Windows Pro license is required as a qualifying base OS license in order to use a client Volume License offering.
See the part number tables in the following sections to see which adapters are supported with Windows 10 and Windows 11:
GPU recommended: Lenovo recommends that if you plan to install Windows 10 or 11 on this server to run graphics-intensive applications, then you should selected a dedicated graphics adapter (GPU).
The following components are not supported:
- Fibre Channel adapters
- InfiniBand and VPI adapters
- External storage adapters
- Flash storage adapters
Physical and electrical specifications
The SR635 V3 has the following overall physical dimensions, excluding components that extend outside the standard chassis, such as EIA flanges, front security bezel (if any), and power supply handles:
- Width: 440 mm (17.3 inches)
- Height: 43 mm (1.7 inches)
- Depth: 773 mm (30.4 inches)
The following table lists the detailed dimensions. See the figure below for the definition of each dimension.
The shipping (cardboard packaging) dimensions of the SR635 V3 are as follows:
- Width: 587 mm (23.1 inches)
- Height: 225 mm (8.9 inches)
- Depth: 998 mm (39.3 inches)
The server has the following weight:
- Maximum weight: 20.2 kg (44.6 lb)
The server has the following electrical specifications for AC input power supplies:
- Input voltage:
- 100 to 127 (nominal) Vac, 50 Hz or 60 Hz
- 200 to 240 (nominal) Vac, 50 Hz or 60 Hz
- 180 to 300 Vdc (China only)
- Inlet current: see the following table.
Electrical specifications for DC input power supply:
- Input voltage: -48 to -60 Vdc
- Inlet current (1100W power supply): 26 A
Operating environment
The SR635 V3 server complies with ASHRAE Class A2 specifications with most configurations, and depending on the hardware configuration, also complies with ASHRAE Class A3 and Class A4 specifications. System performance may be impacted when operating temperature is outside ASHRAE A2 specification.
Depending on the hardware configuration, the SR635 V3 server also complies with ASHRAE Class H1 specification. System performance may be impacted when operating temperature is outside ASHRAE H1 specification.
Topics in this section:
Ambient temperature requirements - heatsinks and closed-loop cooling
For configurations with air cooling or closed-loop liquid cooling, the restrictions to ASHRAE support are as follows:
- The ambient temperature must be limited to 45°C or lower (TDP ＜ 240W) if the server meets the following conditions:
- Installed with any TruDDR5 memory DIMM (64 GB or below)
- Without 2.5" NVMe, NVMe M.2 or NVMe AIC drives
- Without rear drives or 7mm drives
- Without GPU adapters
- Without any PCIe network interface cards (NICs) at a rate ≥ 25 Gb
- Without any parts with AOC and at a rate ≥ 25 Gb
- Without closed loop heat sink
- The ambient temperature must be limited to 40°C or lower (TDP ＜300 W) if the server meets the following conditions:
- Installed with any TruDDR5 memory DIMM (64 GB or below)
- Without 2.5" NVMe, NVMe M.2 or NVMe AIC drives
- Without rear drives or 7mm drives
- Without GPU adapters
- Without any PCIe network interface cards (NICs) at a rate ≥ 25 Gb
- Without any parts with AOC and at a rate ≥ 25 Gb
- Without closed loop heat sink
- The ambient temperature must be limited to 35°C or lower (320 W ≤TDP ≤ 400 W) if the server has any of the following components:
- TruDDR5 memory 128 GB DIMM
- ThinkSystem 256GB TruDDR5 4800MHz (8Rx4) 3DS RDIMM-A v2
- NVMe, NVMe M.2 or NVMe AIC drives
- Broadcom 57416 10GBASE-T 2-port OCP
- Broadcom 57454 10GBASE-T 4-port OCP
- PCIe network interface cards (NICs) at a rate ≥ 25 Gb
- Parts with AOC and at a rate ≥ 25 Gb
- GPU adapters
- The ambient temperature must be limited to 30°C or lower if the server has any of the following components:
- Rear drives
- EDSFF drives
- Parts with AOC and at a rate > 25 GB
- PCIe network interface cards (NICs) at a rate > 25 Gb
- ThinkSystem 256GB TruDDR5 4800MHz (8Rx4) 3DS RDIMM-A v1
Server shutdown: When the ambient temperature is greater than the supported max temperature (ASHARE A4 45°C), the server will shut down. The server will not power on again until the ambient temperature falls within the supported temperature range.
For additional information, see the Environmental specifications and Thermal rules sections in the product documentation:
https://pubs.lenovo.com/sr635-v3/server_specifications_environmental
https://pubs.lenovo.com/sr635-v3/thermal_rules
Ambient temperature requirements - open-loop cooling
For configurations with open-loop liquid cooling, the restrictions to ASHRAE support are as follows:
- The ambient temperature must be limited to 45°C or lower (TDP＜240W) if the server meets the following conditions:
- Installed with any TruDDR5 memory DIMM (64 GB or below)
- Without 2.5" NVMe, NVMe M.2 or NVMe AIC drives
- Without rear drives or 7mm drives
- Without GPU adapters
- Without any PCIe network interface cards (NICs) at a rate ≥ 25 Gb
- Without any parts with AOC and at a rate ≥ 25 Gb
- The ambient temperature must be limited to 40°C or lower (TDP ＜300 W) if the server meets the following conditions:
- Installed with any TruDDR5 memory DIMM (64 GB or below)
- Without 2.5" NVMe, NVMe M.2 or NVMe AIC drives
- Without rear drives or 7mm drives
- Without GPU adapters
- Without any PCIe network interface cards (NICs) at a rate ≥ 25 Gb
- Without any parts with AOC and at a rate ≥ 25 Gb
- The ambient temperature must be limited to 35°C or lower (320 W ≤TDP ≤ 400 W) if the server has any of the following components:
- TruDDR5 memory 128 GB DIMM (4800MHz/5600MHz/6400MHz)
- ThinkSystem 256GB TruDDR5 4800MHz (8Rx4) 3DS RDIMM-A v2
- NVMe, NVMe M.2 or NVMe AIC drives
- Broadcom 57416 10GBASE-T 2-port OCP
- Broadcom 57454 10GBASE-T 4-port OCP
- PCIe network interface cards (NICs) at a rate ≥ 25 Gb
- Parts with AOC and at a rate ≥ 25 Gb
- GPU adapters
- The ambient temperature must be limited to 30°C or lower if the server has any of the following components:
- Rear drives
- EDSFF drives
- Parts with AOC and at a rate higher than 25 GB
- PCIe network interface cards (NICs) at a rate > 25 Gb
- ThinkSystem 256GB TruDDR5 4800MHz (8Rx4) 3DS RDIMM-A v1
Server shutdown: When the ambient temperature is greater than the supported max temperature (ASHARE A4 45°C), the server will shut down. The server will not power on again until the ambient temperature falls within the supported temperature range.
For additional information, see the Environmental specifications and Thermal rules sections in the product documentation:
https://pubs.lenovo.com/sr635-v3/server_specifications_environmental
https://pubs.lenovo.com/sr635-v3/thermal_rules
Water requirements - open-loop cooling
The SR635 V3 when configured with open-loop liquid cooling has the following water requirements:
- Maximum pressure: 3 bars
- Water inlet temperature and flow rates as listed in the following table
The water required to initially fill the system side cooling loop must be reasonably clean, bacteria-free water (<100 CFU/ml) such as de-mineralized water, reverse osmosis water, de-ionized water, or distilled water. The water must be filtered with an in-line 50 micron filter (approximately 288 mesh). The water must be treated with anti-biological and anti-corrosion measures. Environment quality must be maintained over the lifetime of the system to receive warranty and support on affecting components. For more information, see Lenovo Neptune Direct Water-Cooling Standards.
Temperature and humidity
The server is supported in the following environment:
- Air temperature:
- Operating:
- ASHRAE Class A2: 10°C to 35°C (50°F to 95°F); the maximum ambient temperature decreases by 1°C for every 300 m (984 ft) increase in altitude above 900 m (2,953 ft).
- ASHRAE Class A3: 5°C to 40°C (41°F to 104°F); the maximum ambient temperature decreases by 1°C for every 175 m (574 ft) increase in altitude above 900 m (2,953 ft).
- ASHRAE Class A4: 5°C to 45°C (41°F to 113°F); the maximum ambient temperature decreases by 1°C for every 125 m (410 ft) increase in altitude above 900 m (2,953 ft).
- ASHRAE Class H1: 5 °C to 25 °C (41 °F to 77 °F); Decrease the maximum ambient temperature by 1°C for every 500 m (1640 ft) increase in altitude above 900 m (2,953 ft).
- Server off: 5°C to 45°C (41°F to 113°F)
- Shipment/storage: -40°C to 60°C (-40°F to 140°F)
- Operating:
- Maximum altitude: 3,050 m (10,000 ft)
- Relative Humidity (non-condensing):
- Operating
- ASHRAE Class A2: 8% to 80%; maximum dew point: 21°C (70°F)
- ASHRAE Class A3: 8% to 85%; maximum dew point: 24°C (75°F)
- ASHRAE Class A4: 8% to 90%; maximum dew point: 24°C (75°F)
- ASHRAE Class H1: 8% to 80%; Maximum dew point: 17°C (63°F)
- Shipment/storage: 8% to 90%
- Operating
Heat output
The server generates the following heat:
- Heat/thermal output:
- Minimum configuration: 2859 BTU/hr, 837 W
- Maximum configuration: 8164 BTU/hr, 2393 W
Acoustical noise emissions
The SR635 V3 has the following acoustic noise emissions declaration:
- Sound power level (LWAd):
- Idling: 6.7 Bel (Typical), 6.7 Bel (GPU rich), 7.4 Bel (Storage rich)
- Operating: 8.4 Bel (Typical), 8.3 Bel (GPU rich), 7.9 Bel (Storage rich)
- Sound pressure level (LpAm):
- Idling: 52.3 dBA (Typical), 52.3 dBA (GPU rich), 59.9 dBA (Storage rich)
- Operating: 68.7 dBA (Typical), 67.7 dBA (GPU rich), 64.1 dBA (Storage rich)
Notes:
- These sound levels were measured in controlled acoustical environments according to procedures specified by ISO7779 and are reported in accordance with ISO 9296.
- The declared acoustic sound levels are based on the following configurations, which may change depending on configuration/conditions：
- Typical: 1x 300W CPU, 12x 64GB RDIMM, 10x SAS HDD, 440-16i CFF raid, Broadcom 5719 1GbE RJ45 4-port OCP Ethernet Adapter, 2x 1100W PSU
- GPU rich: 1x 300W CPU, 12x 64GB RDIMM, 10x SAS HDD, 440-16i CFF raid, Broadcom 5719 1GbE RJ45 4-port OCP Ethernet Adapter, 1x A2 GPU, 2x 1100W PSU
- Storage rich: 1x 240W CPU, 12x 64GB RDIMM, 12x SAS HDD, 440-16i CFF raid, Broadcom 5719 1GbE RJ45 4-port OCP Ethernet Adapter, 2x 750W PSU
Government regulations (such as those prescribed by OSHA or European Community Directives) may govern noise level exposure in the workplace and may apply to you and your server installation. The actual sound pressure levels in your installation depend upon a variety of factors, including the number of racks in the installation; the size, materials, and configuration of the room; the noise levels from other equipment; the room ambient temperature, and employee's location in relation to the equipment. Further, compliance with such government regulations depends on a variety of additional factors, including the duration of employees' exposure and whether employees wear hearing protection. Lenovo recommends that you consult with qualified experts in this field to determine whether you are in compliance with the applicable regulations.
Shock and vibration
The server has the following vibration and shock limits:
- Vibration:
- Operating: 0.21 G rms at 5 Hz to 500 Hz for 15 minutes across 3 axes
- Non-operating: 1.04 G rms at 2 Hz to 200 Hz for 15 minutes across 6 surfaces
- Shock:
- Operating: 15 G for 3 milliseconds in each direction (positive and negative X, Y, and Z axes)
- Non-operating:
- 12 kg - 22 kg: 50 G for 152 in./sec velocity change across 6 surfaces
Particulate contamination
Airborne particulates (including metal flakes or particles) and reactive gases acting alone or in combination with other environmental factors such as humidity or temperature might damage the system that might cause the system to malfunction or stop working altogether.
The following specifications indicate the limits of particulates that the system can tolerate:
- Reactive gases:
- The copper reactivity level shall be less than 200 Angstroms per month (Å/month)
- The silver reactivity level shall be less than 200 Å/month
- Airborne particulates:
- The room air should be continuously filtered with MERV 8 filters.
- Air entering a data center should be filtered with MERV 11 or preferably MERV 13 filters.
- The deliquescent relative humidity of the particulate contamination should be more than 60% RH
- Environment must be free of zinc whiskers
For additional information, see the Specifications section of the documentation for the server, available from the Lenovo Documents site, https://pubs.lenovo.com/
Water infrastructure for the Lenovo Neptune Processor DWC Module
The Lenovo Processor Neptune Core Module is the liquid-based processor cooling offering for the SR635 V3, as described in the Lenovo Processor Neptune Core Module section.
The open-loop cooling module requires the following water infrastructure components in the rack cabinet and data center:
- Supported 42U or 48U rack cabinet
The 42U or 48U Heavy Duty Rack Cabinet (machine types 7D6D or 7D6E) are supported. Two 0U mounting points are required for the water manifolds, at the rear of the rack cabinet, one either side.
For information about the 42U and 48U Heavy Duty Rack Cabinets, see the product guide:
https://lenovopress.lenovo.com/lp1498-lenovo-heavy-duty-rack-cabinets - 38-port water manifold (machine type 7DE6), installed in the rear of the rack cabinet
The manifold provides quick-disconnect couplings that each server in the rack are connected to. Ordering information is in the table below.
- Coolant distribution unit (CDU), either in-rack or in-row
In-rack CDUs are installed at the bottom of the rack cabinet. The supported in-rack CDU is as follows:
- Lenovo Neptune DWC RM100 In-Rack CDU; see the RM100 In-Rack Coolant Distribution Unit section
In-row CDUs are separate cabinets that are typically installed at the end of a row of rack cabinets. Examples of suitable in-row CDUs include (but not limited to):
- CoolTera FS400 310KW CDU
- Vertiv Liebert XDU60 60KW CDU
- Hose kit to connect to the CDU to the manifold
Ordering information is in the table below.
The following figure shows the major components of the solution.
Figure 24. Water manifold connections
Configuration requirements:
- Maximum number of SR635 V3 servers supported in a rack:
- 48U rack: 38 servers
- 42U rack with in-rack CDU: 35 servers
- 42U rack without in-rack CDU: 38 servers
- Inlet water flow rate:
- 0.5 LPM: Maximum 40°C inlet water temperature
- 1.0 LPM: Maximum 45°C inlet water temperature
- 1.5 LPM: Maximum 50°C inlet water temperature
- Water pressure requirement:
- Maximum operating node inlet pressure = 43.5 psi (3 bars)
Note: Water quality must be maintained over the lifetime of the system to receive warranty and support on affecting components. For water quality requirement, see Lenovo Neptune Direct Water-Cooling Standards
The 38-drop water manifold and hoses can be ordered as listed in the following table.
Configuration notes:
- This water connection solution described here cannot be used with the DW612S and N1380 enclosures as the water requirements are different.
- The hoses for in-row CDUs that are listed in the table above have Eaton FD83 quick-disconnect couplings
RM100 In-Rack Coolant Distribution Unit
The RM100 In-Rack Coolant Distribution Unit (CDU) can provide 100kW cooling capacity within the rack cabinet. It is designed as a 4U high rack device installed at the bottom of the rack. The CDU is supported in the 42U and 48U Heavy Duty Rack Cabinets.
For information about the 42U and 48U Heavy Duty Rack Cabinets, see the product guide:
https://lenovopress.lenovo.com/lp1498-lenovo-heavy-duty-rack-cabinets
The following figure shows the RM100 CDU.
Figure 25. RM100 In-Rack Coolant Distribution Unit
The CDU can be ordered using the CTO process in the configurators using machine type 7DBL. The following table lists the base CTO model and base feature code.
| CTO model | Base feature | Description |
|---|---|---|
| 7DBLCTOLWW | BRL4 | Lenovo Neptune DWC RM100 In-Rack CDU |
For details and exact specification of the CDU, see the In-Rack CDU Operation & Maintenance Guide:
https://pubs.lenovo.com/hdc_rackcabinet/rm100_user_guide.pdf
Professional Services: The factory integration of the In-Rack CDU requires Lenovo Professional Services review and approval for warranty and associated extended services. Before ordering CDU and manifold, contact the Lenovo Professional Services team ( ).
Warranty upgrades and post-warranty support
The SR635 V3 has a 3-year or 1-year warranty based on the machine type of the system:
- 7D9G - 3 year warranty
- 7D9H - 1 year warranty
Our global network of regional support centers offers consistent, local-language support enabling you to vary response times and level of service to match the criticality of your support needs:
- Standard Next Business Day – Best choice for non-essential systems requiring simple maintenance.
- Premier Next Business Day – Best choice for essential systems requiring technical expertise from senior-level Lenovo engineers.
- Premier 24x7 4-Hour Response – Best choice for systems where maximum uptime is critical.
- Premier Enhanced Storage Support 24x7 4-Hour Response – Best choice for storage systems where maximum uptime is critical.
For more information, consult the brochure Lenovo Operational Support Services for Data Centers Services.
Services
Lenovo Data Center Services empower you at every stage of your IT lifecycle. From expert advisory and strategic planning to seamless deployment and ongoing support, we ensure your infrastructure is built for success. Our comprehensive services accelerate time to value, minimize downtime, and free your IT staff to focus on driving innovation and business growth.
Note: Some service options may not be available in all markets or regions. For more information, go to https://lenovolocator.com/. For information about Lenovo service upgrade offerings that are available in your region, contact your local Lenovo sales representative or business partner.
In this section:
- Lenovo Advisory Services
- Lenovo Plan & Design Services
- Lenovo Deployment, Migration, and Configuration Services
- Lenovo Support Services
- Lenovo Managed Services
- Lenovo Sustainability Services
Lenovo Advisory Services
Lenovo Advisory Services simplify the planning process, enabling customers to build future-proofed strategies in as little as six weeks. Consultants provide guidance on projects including VM migration, storage, backup and recovery, and cost management to accelerate time to value, improve cost efficiency, and build a flexibly scalable foundation.
- Assessment Services
An Assessment helps solve your IT challenges through an onsite, multi-day session with a Lenovo technology expert. We perform a tools-based assessment which provides a comprehensive and thorough review of a company's environment and technology systems. In addition to the technology based functional requirements, the consultant also discusses and records the non-functional business requirements, challenges, and constraints. Assessments help organizations like yours, no matter how large or small, get a better return on your IT investment and overcome challenges in the ever-changing technology landscape.
- Design Services
Professional Services consultants perform infrastructure design and implementation planning to support your strategy. The high-level architectures provided by the assessment service are turned into low level designs and wiring diagrams, which are reviewed and approved prior to implementation. The implementation plan will demonstrate an outcome-based proposal to provide business capabilities through infrastructure with a risk-mitigated project plan.
Lenovo Plan & Design Services
Unlock faster time to market with our tailored, strategic design workshops to align solution approaches with your business goals and technical requirements. Leverage our deep solution expertise and end-to-end delivery partnership to meet your goals efficiently and effectively.
Lenovo Deployment, Migration, and Configuration Services
Optimize your IT operations by shifting labor-intensive functions to Lenovo's skilled technicians for seamless on-site or remote deployment, configuration, and migration. Enjoy peace of mind, faster time to value, and comprehensive knowledge sharing with your IT staff, backed by our best-practice methodology.
- Deployment Services for Storage and ThinkAgile
A comprehensive range of remote and onsite options tailored specifically for your business needs to ensure your storage and ThinkAgile hardware are fully operational from the start.
- Hardware Installation Services
A full-range, comprehensive setup for your hardware, including unpacking, inspecting, and positioning components to ensure your equipment is operational and error-free for the most seamless and efficient installation experience, so you can quickly benefit from your investments.
- DM/DG File Migration Services
Take the burden of file migration from your IT’s shoulders. Our experts will align your requirements and business objectives to the migration plans while coordinating with your team to plan and safely execute the data migration to your storage platforms.
- DM/DG/DE Health Check Services
Our experts perform proactive checks of your Firmware and system health to ensure your machines are operating at peak and optimal efficiency to maximize up-time, avoid system failures, ensure the security of IT solutions and simplify maintenance.
- Factory Integrated Services
A suite of value-added offerings provided during the manufacturing phase of a server or storage system that reduces time to value. These services aim at improving your hardware deployment experience and enhance the quality of a standard configuration before it arrives at your facility.
Lenovo Support Services
In addition to response time options for hardware parts, repairs, and labor, Lenovo offers a wide array of additional support services to ensure your business is positioned for success and longevity. Our goal is to reduce your capital outlays, mitigate your IT risks, and accelerate your time to productivity.
- Premier Support for Data Centers
Your direct line to the solution that promises the best, most comprehensive level of support to help you fully unlock the potential of your data center.
- Premier Enhanced Storage Support (PESS)
Gain all the benefits of Premier Support for Data Centers, adding dedicated storage specialists and resources to elevate your storage support experience to the next level.
- Committed Service Repair (CSR)
Our commitment to ensuring the fastest, most seamless resolution times for mission-critical systems that require immediate attention to ensure minimal downtime and risk for your business. This service is only available for machines under the Premier 4-Hour Response SLA.
- Multivendor Support Services (MVS)
Your single point of accountability for resolution support across vast range of leading Server, Storage, and Networking OEMs, allowing you to manage all your supported infrastructure devices seamlessly from a single source.
- Keep Your Drive (KYD)
Protect sensitive data and maintain compliance with corporate retention and disposal policies to ensure your data is always under your control, regardless of the number of drives that are installed in your Lenovo server.
- Technical Account Manager (TAM)
Your single point of contact to expedite service requests, provide status updates, and furnish reports to track incidents over time, ensuring smooth operations and optimized performance as your business grows.
- Enterprise Software Support (ESS)
Gain comprehensive, single-source, and global support for a wide range of server operating systems and Microsoft server applications.
For more information, consult the brochure Lenovo Operational Support Services for Data Centers.
Lenovo Managed Services
Achieve peak efficiency, high security, and minimal disruption with Lenovo's always-on Managed Services. Our real-time monitoring, 24x7 incident response, and problem resolution ensure your infrastructure operates seamlessly. With quarterly health checks for ongoing optimization and innovation, Lenovo's remote active monitoring boosts end-user experience and productivity by keeping your data center's hardware performing at its best.
Lenovo Managed Services provides continuous 24x7 remote monitoring (plus 24x7 call center availability) and proactive management of your data center using state-of-the-art tools, systems, and practices by a team of highly skilled and experienced Lenovo services professionals.
Quarterly reviews check error logs, verify firmware & OS device driver levels, and software as needed. We’ll also maintain records of latest patches, critical updates, and firmware levels, to ensure you systems are providing business value through optimized performance.
Lenovo Sustainability Services
- Asset Recovery Services
Lenovo Asset Recovery Services (ARS) provides a secure, seamless solution for managing end-of-life IT assets, ensuring data is safely sanitized while contributing to a more circular IT lifecycle. By maximizing the reuse or responsible recycling of devices, ARS helps businesses meet sustainability goals while recovering potential value from their retired equipment. For more information, see the Asset Recovery Services offering page.
- CO2 Offset Services
Lenovo’s CO2 Offset Services offer a simple and transparent way for businesses to take tangible action on their IT footprint. By integrating CO2 offsets directly into device purchases, customers can easily support verified climate projects and track their contributions, making meaningful progress toward their sustainability goals without added complexity.
- Lenovo Certified Refurbished
Lenovo Certified Refurbished offers a cost-effective way to support IT circularity without compromising on quality and performance. Each device undergoes rigorous testing and certification, ensuring reliable performance and extending its lifecycle. With Lenovo’s trusted certification, you gain peace of mind while making a more sustainable IT choice.
Lenovo TruScale
Lenovo TruScale XaaS is your set of flexible IT services that makes everything easier. Streamline IT procurement, simplify infrastructure and device management, and pay only for what you use – so your business is free to grow and go anywhere.
Lenovo TruScale is the unified solution that gives you simplified access to:
- The industry’s broadest portfolio – from pocket to cloud – all delivered as a service
- A single-contract framework for full visibility and accountability
- The global scale to rapidly and securely build teams from anywhere
- Flexible fixed and metered pay-as-you-go models with minimal upfront cost
- The growth-driving combination of hardware, software, infrastructure, and solutions – all from one single provider with one point of accountability.
For information about Lenovo TruScale offerings that are available in your region, contact your local Lenovo sales representative or business partner.
Regulatory compliance
The SR635 V3 conforms to the following standards:
- ANSI/UL 62368-1
- IEC 62368-1 (CB Certificate and CB Test Report)
- CSA C22.2 No. 62368-1
- Mexico NOM-019
- India BIS 13252 (Part 1)
- Germany GS
- TUV-GS (EN62368-1, and EK1-ITB2000)
- Ukraine UkrCEPRO
- Morocco CMIM Certification (CM)
- Russia, Belorussia and Kazakhstan, TP EAC 037/2016 (for RoHS)
- Russia, Belorussia and Kazakhstan, EAC: TP TC 004/2011 (for Safety); TP TC 020/2011 (for EMC)
- CE, UKCA Mark (EN55032 Class A, EN62368-1, EN55024, EN55035, EN61000-3-2, EN61000-3-3, (EU) 2019/424, and EN IEC 63000 (RoHS))
- FCC - Verified to comply with Part 15 of the FCC Rules, Class A
- Canada ICES-003, issue 7, Class A
- CISPR 32, Class A, CISPR 35
- Korea KN32, Class A, KN35
- Japan VCCI, Class A
- Taiwan BSMI CNS15936, Class A; CNS15598-1; Section 5 of CNS15663
- Australia/New Zealand AS/NZS CISPR 32, Class A; AS/NZS 62368.1
- UL Green Guard, UL2819
- Energy Star 4.0
- EPEAT (NSF/ ANSI 426) Bronze
- Japanese Energy-Saving Act
- EU2019/424 Energy Related Product (ErP Lot9)
- China CCC certificate, GB17625.1; GB4943.1; GB/T9254
- China CECP certificate, CQC3135
- China CELP certificate, HJ 2507-2011
External drive enclosures
The server supports attachment to external drive enclosures using a RAID controller with external ports or a SAS host bus adapter. Adapters supported by the server are listed in the SAS adapters for external storage section.
Note: Information provided in this section is for ordering reference purposes only. For the operating system and adapter support details, refer to the interoperability matrix for a particular storage enclosure that can be found on the Lenovo Data Center Support web site:
http://datacentersupport.lenovo.com
For details about supported drives, adapters, and cables, see the following Lenovo Press Product Guides:
- Lenovo Storage D1212 and D1224
http://lenovopress.lenovo.com/lp0512 - Lenovo Storage D3284
http://lenovopress.lenovo.com/lp0513 - Lenovo ThinkSystem D4390
https://lenovopress.lenovo.com/lp1681
External storage systems
Lenovo offers the ThinkSystem DE Series, ThinkSystem DG Series and ThinkSystem DM Series external storage systems for high-performance storage. See the DE Series, DG Series and DM Series product guides for specific controller models, expansion enclosures and configuration options:
- ThinkSystem DE Series Storage
https://lenovopress.com/storage/thinksystem/de-series#rt=product-guide - ThinkSystem DM Series Storage
https://lenovopress.com/storage/thinksystem/dm-series#rt=product-guide - ThinkSystem DG Series Storage
https://lenovopress.com/storage/thinksystem/dg-series#rt=product-guide
External backup units
The following table lists the external backup options that are offered by Lenovo.
For more information, see the list of Product Guides in the Backup units category:
https://lenovopress.com/servers/options/backup
Fibre Channel SAN switches
Lenovo offers the ThinkSystem DB Series of Fibre Channel SAN switches for high-performance storage expansion. See the DB Series product guides for models and configuration options:
- ThinkSystem DB Series SAN Switches:
https://lenovopress.com/storage/switches/rack#rt=product-guide
Uninterruptible power supply units
The following table lists the uninterruptible power supply (UPS) units that are offered by Lenovo.
† Only available in China and the Asia Pacific market.
For more information, see the list of Product Guides in the UPS category:
https://lenovopress.com/servers/options/ups
Power distribution units
The following table lists the power distribution units (PDUs) that are offered by Lenovo.
For more information, see the Lenovo Press documents in the PDU category:
https://lenovopress.com/servers/options/pdu
Rack cabinets
The following table lists the supported rack cabinets.
For specifications about these racks, see the Lenovo Rack Cabinet Reference, available from:
https://lenovopress.com/lp1287-lenovo-rack-cabinet-reference
For more information, see the list of Product Guides in the Rack cabinets category:
https://lenovopress.com/servers/options/racks
KVM console options
The following table lists the supported KVM consoles.
The following table lists the keyboards supported with the 1U 18.5" Standard Console (now withdrawn).
Note: These keyboards are not supported with the ThinkSystem 18.5" LCD Console.
The following table lists the available KVM switches and the options that are supported with them.
For more information, see the list of Product Guides in the KVM Switches and Consoles category:
http://lenovopress.com/servers/options/kvm
Lenovo Financial Services
Why wait to obtain the technology you need now? No payments for 90 days and predictable, low monthly payments make it easy to budget for your Lenovo solution.
- Flexible
Our in-depth knowledge of the products, services and various market segments allows us to offer greater flexibility in structures, documentation and end of lease options.
- 100% Solution Financing
Financing your entire solution including hardware, software, and services, ensures more predictability in your project planning with fixed, manageable payments and low monthly payments.
- Device as a Service (DaaS)
Leverage latest technology to advance your business. Customized solutions aligned to your needs. Flexibility to add equipment to support growth. Protect your technology with Lenovo's Premier Support service.
- 24/7 Asset management
Manage your financed solutions with electronic access to your lease documents, payment histories, invoices and asset information.
- Fair Market Value (FMV) and $1 Purchase Option Leases
Maximize your purchasing power with our lowest cost option. An FMV lease offers lower monthly payments than loans or lease-to-own financing. Think of an FMV lease as a rental. You have the flexibility at the end of the lease term to return the equipment, continue leasing it, or purchase it for the fair market value. In a $1 Out Purchase Option lease, you own the equipment. It is a good option when you are confident you will use the equipment for an extended period beyond the finance term. Both lease types have merits depending on your needs. We can help you determine which option will best meet your technological and budgetary goals.
Ask your Lenovo Financial Services representative about this promotion and how to submit a credit application. For the majority of credit applicants, we have enough information to deliver an instant decision and send a notification within minutes.
Seller training courses
The following sales training courses are offered for employees and partners (login required). Courses are listed in date order.
-
Family Portfolio: Storage Controller Options
2025-03-03 | 25 minutes | Employees and Partners
DetailsFamily Portfolio: Storage Controller OptionsThis course covers the storage controller options available for use in Lenovo servers. The classes of storage controller are discussed, along with a discussion of where they are used, and which to choose.
Published: 2025-03-03
After completing this course, you will be able to:
• Describe the classes of storage controllers
• Discuss where each controller class is used
• Describe the available options in each controller class
Tags: Sales, Storage
Length: 25 minutesCourse code: SXXW1111r2Start the training:
Employee link: Grow@Lenovo
Partner link: Lenovo Partner Learning -
ThinkSystem Rack and Tower Introduction for ISO Client Managers
2024-12-10 | 20 minutes | Employees Only
DetailsThinkSystem Rack and Tower Introduction for ISO Client ManagersIn this course, you will learn about Lenovo’s Data Center Portfolio, its ThinkSystem Family and the key features of the Rack and Tower servers. It will equip you with foundational knowledge which you can then expand upon by participating in the facilitated session of the curriculum.
Published: 2024-12-10
Course Objectives:
• By the end of this course, you should be able to:
• Identify Lenovo’s main data center brands.
• Describe the key components of the ThinkSystem Family servers.
• Differentiate between the Rack and Tower servers of the ThinkSystem Family.
• Understand the value Rack and Tower servers can provide to customers.
Tags: Server, ThinkSystem
Length: 20 minutesCourse code: DSRTO101r2Start the training:
Employee link: Grow@Lenovo -
Partner Technical Webinar - Server Update with Mark Bica
2024-11-26 | 60 minutes | Employees and Partners
DetailsPartner Technical Webinar - Server Update with Mark BicaIn this 60-minute replay, Mark Bica, Lenovo Product Manager gave an update on the server portfolio. Mark presented on the new V4 Intel servers with Xeon 6 CPUs. He reviewed where the new AMD 5th Gen EPYC CPUs will be used in our servers. He followed with a review of the GPU dense servers including SR680, SR680a, SR575 and SR780a. Mark concluded with a review of the SC777 and SC750 that were introduced at TechWorld.
Published: 2024-11-26
Tags: Server
Length: 60 minutesCourse code: 112224Start the training:
Employee link: Grow@Lenovo
Partner link: Lenovo Partner Learning -
Family Portfolio: ThinkSystem Rackmount and Tower Servers powered by AMD
2024-11-25 | 30 minutes | Employees and Partners
DetailsFamily Portfolio: ThinkSystem Rackmount and Tower Servers powered by AMDThis course presents the key products and features of the ThinkSystem Rackmount and Tower server family powered by AMD processors. It describes customer benefits and will help you recognize when a specific product should be selected.
Published: 2024-11-25
Course Objectives:
By the end of this course, you should be able to:
• Identify products and features within the family
• Describe customer benefits offered by this family
• Recognize when a specific product should be selected
Tags: Server, ThinkSystem
Length: 30 minutesCourse code: SXXW1216r10Start the training:
Employee link: Grow@Lenovo
Partner link: Lenovo Partner Learning -
Partner Technical Webinar - LenovoPress updates and LPH Demo
2024-11-13 | 60 minutes | Employees and Partners
DetailsPartner Technical Webinar - LenovoPress updates and LPH DemoIn this 60-minute replay, we had 3 topics. First, David Watts, Lenovo Sr Manager LenovoPress, gave an update on LenovoPress and improvements to finding Seller Training Courses (both partner and Lenovo). Next, Ryan Tuttle, Lenovo LETS Solution Architect, gave a demo of Lenovo Partner Hub (LPH) including how to find replays of Partner Webinars in LPL. Finally, Joe Murphy, Lenovo Sr Manager of LETS NA, gave a quick update on the new Stackable Warranty Options in DCSC.
Published: 2024-11-13
Tags: Technical Sales
Length: 60 minutesCourse code: 110824Start the training:
Employee link: Grow@Lenovo
Partner link: Lenovo Partner Learning -
Virtual Facilitated Session - ThinkSystem Rack and Tower Primer for ISO Client Managers
2024-10-31 | 90 minutes | Employees Only
DetailsVirtual Facilitated Session - ThinkSystem Rack and Tower Primer for ISO Client ManagersIn this Virtual Instructor-Led Training Session, ISO Client Managers will be able to build on the knowledge gained in Module 1 (eLearning) of the ThinkSystem Rack and Tower Server Primer for ISO Client Managers curriculum.
Published: 2024-10-31
IMPORTANT! Module 1 (eLearning) must be completed to be eligible to participate in this session. Please note that places are subject to availability. If you are selected, you will receive the invite to this session via email.
Tags: Sales, Server, ThinkSystem
Length: 90 minutesCourse code: DSRTO102Start the training:
Employee link: Grow@Lenovo -
Q3 Solutions Launch AMD EPYC Gen5 Quick Hit
2024-10-09 | 6 minutes | Employees and Partners
DetailsQ3 Solutions Launch AMD EPYC Gen5 Quick HitLenovo announces upgrades to a wide range of ThinkSystem V3 servers powered by AMD processors. Support for the AMD EPYC 9005 Series processors and faster DDR5 memory will enhance the performance and power efficiency of these servers as well as the ThinkAgile systems based on them
Published: 2024-10-09
Tags: Artificial Intelligence (AI), Lowdown2025ep3, Server, ThinkAgile, ThinkSystem
Length: 6 minutesCourse code: SXXW1216r9aStart the training:
Employee link: Grow@Lenovo
Partner link: Lenovo Partner Learning -
Partner Technical Webinar - OneIQ
2024-07-15 | 60 minutes | Employees and Partners
DetailsPartner Technical Webinar - OneIQIn this 60-minute replay, Peter Grant, Field CTO for OneIQ, reviewed and demo’d the capabilities of OneIQ including collecting data and analyzing. Additionally, Peter and the team discussed how specific partners (those with NA Channel SA coverage) will get direct access to OneIQ and other partners can get access to OneIQ via Distribution or the NA LETS team.
Published: 2024-07-15
Tags: Technical Sales
Length: 60 minutesCourse code: 071224Start the training:
Employee link: Grow@Lenovo
Partner link: Lenovo Partner Learning -
SAP Webinar for Lenovo Sellers: Lenovo Portfolio Update for SAP Landscapes
2024-06-04 | 60 minutes | Employees Only
DetailsSAP Webinar for Lenovo Sellers: Lenovo Portfolio Update for SAP LandscapesJoin Mark Kelly, Advisory IT Architect with the Lenovo Global SAP Center of Competence as he discusses:
Published: 2024-06-04
•Challenges in the SAP environment
•Lenovo On-premise Solutions for SAP
•Lenovo support resources for SAP solutions
Tags: SAP, ThinkAgile, ThinkEdge, ThinkSystem
Length: 60 minutesCourse code: DSAPF101Start the training:
Employee link: Grow@Lenovo -
Lenovo Data Center Product Portfolio
2024-05-29 | 20 minutes | Employees and Partners
DetailsLenovo Data Center Product PortfolioThis course introduces the Lenovo data center portfolio, and covers servers, storage, storage networking, and software-defined infrastructure products. After completing this course about Lenovo data center products, you will be able to identify product types within each data center family, describe Lenovo innovations that this product family or category uses, and recognize when a specific product should be selected.
Published: 2024-05-29
Tags: Advanced DataCenter, DataCenter Products, ThinkAgile, ThinkEdge, ThinkSystem
Length: 20 minutesCourse code: SXXW1110r7Start the training:
Employee link: Grow@Lenovo
Partner link: Lenovo Partner Learning -
VTT Cloud Architecture: NVIDIA Using Cloud for GPUs and AI
2024-05-22 | 60 minutes | Employees Only
DetailsVTT Cloud Architecture: NVIDIA Using Cloud for GPUs and AIJoin JD Dupont, NVIDIA Head of Americas Sales, Lenovo partnership and Veer Mehta, NVIDIA Solution Architect on an interactive discussion about cloud to edge, designing cloud Solutions with NVIDIA GPUs and minimizing private\hybrid cloud OPEX with GPUs. Discover how you can use what is done at big public cloud providers for your customers. We will also walk through use cases and see a demo you can use to help your customers.
Published: 2024-05-22
Tags: Artificial Intelligence (AI), Cloud, Nvidia, Software Defined Infrastruture (SDI), Technical Sales
Length: 60 minutesCourse code: DVCLD212Start the training:
Employee link: Grow@Lenovo -
Partner Technical Webinar - ISG Portfolio Update
2024-04-15 | 60 minutes | Employees and Partners
DetailsPartner Technical Webinar - ISG Portfolio UpdateIn this 60-minute replay, Mark Bica, NA ISG Server Product Manager reviewed the Lenovo ISG portfolio. He covered new editions such as the SR680a \ SR685a, dense servers, and options that are strategic for any workload.
Published: 2024-04-15
Tags: ThinkSystem
Length: 60 minutesCourse code: 041224Start the training:
Employee link: Grow@Lenovo
Partner link: Lenovo Partner Learning -
Family Introduction: Rack and Tower
2024-01-19 | 11 minutes | Employees and Partners
DetailsFamily Introduction: Rack and TowerThis course is designed to give Lenovo sales and partner representatives a foundation on the characteristics of the rack and tower server family. As an introduction to the family, this course also includes positioning, when to use a product, and keywords a client may use when discussing a rack product.
Published: 2024-01-19
Course Objectives:
•Family Characteristics
•Priority Positioning
•Product Usage
•Keywords and Phrases
Tags: Server
Length: 11 minutesCourse code: SXXW1100r3Start the training:
Employee link: Grow@Lenovo
Partner link: Lenovo Partner Learning -
Introduction to DDR5 Memory
2022-08-23 | 10 minutes | Employees and Partners
DetailsIntroduction to DDR5 MemoryThis course introduces DDR5 memory, describes new features of this memory generation, and discusses the advantages to customers of this new memory generation.
Published: 2022-08-23
Tags: Server, Technology solutions
Length: 10 minutesCourse code: SXXW2502Start the training:
Employee link: Grow@Lenovo
Partner link: Lenovo Partner Learning
Related publications and links
For more information, see these resources:
- Lenovo ThinkSystem SR635 V3 product page:
https://www.lenovo.com/us/en/p/servers-storage/servers/racks/thinksystem-sr635-v3/len21ts0020 - ThinkSystem SR635 V3 datasheet
https://lenovopress.lenovo.com/ds0149 - ThinkSystem SR635 V3 drivers and support
http://datacentersupport.lenovo.com/products/servers/thinksystem/sr635v3/7d9g/downloads - Lenovo ThinkSystem SR635 V3 product publications:
https://pubs.lenovo.com/sr635-v3/- User Guide, which includes:
- System Configuration Guide
- Hardware Maintenance Guide
- Rack Installation Guides
- Messages and Codes Reference
- UEFI Manual for ThinkSystem Servers
- User Guide, which includes:
- User Guides for options:
https://serveroption.lenovo.com - ServerProven hardware compatibility:
http://serverproven.lenovo.com
Trademarks
Lenovo and the Lenovo logo are trademarks or registered trademarks of Lenovo in the United States, other countries, or both. A current list of Lenovo trademarks is available on the Web at https://www.lenovo.com/us/en/legal/copytrade/.
The following terms are trademarks of Lenovo in the United States, other countries, or both:
Lenovo®
AnyBay®
Neptune®
ServerProven®
System x®
ThinkAgile®
ThinkEdge®
ThinkShield®
ThinkSystem®
XClarity®
The following terms are trademarks of other companies:
AMD, AMD 3D V-Cache™, and AMD EPYC™ are trademarks of Advanced Micro Devices, Inc.
Intel® and Xeon® are trademarks of Intel Corporation or its subsidiaries.
Linux® is the trademark of Linus Torvalds in the U.S. and other countries.
Microsoft®, ActiveX®, PowerShell, Windows PowerShell®, Windows Server®, and Windows® are trademarks of Microsoft Corporation in the United States, other countries, or both.
SPECpower® is a trademark of the Standard Performance Evaluation Corporation (SPEC).
IBM®, IBM Security®, Power®, Resilient®, and Think® are trademarks of IBM in the United States, other countries, or both.
Other company, product, or service names may be trademarks or service marks of others.
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Full Change History
Changes in the April 22, 2025 update:
- Added the following memory DIMMs - Memory options section:
- ThinkSystem 16GB TruDDR5 6400MHz (1Rx8) RDIMM-A v2, 4X77B07417
- ThinkSystem 32GB TruDDR5 6400MHz (2Rx8) RDIMM-A v2, 4X77B07419
- ThinkSystem 48GB TruDDR5 6400MHz (2Rx8) RDIMM-A v2, 4X77B07423
- ThinkSystem 96GB TruDDR5 6400MHz (2Rx4) RDIMM-A v2, 4X77B07424
- ThinkSystem 128GB TruDDR5 6400MHz (2Rx4) RDIMM-A v2, 4X77B07421
- Removed support for the following DIMM:
- ThinkSystem 64GB TruDDR5 6400MHz (2Rx4) RDIMM-A v2, CA1L
- Added the following Read Intensive NVMe SSDs - Internal drive options section:
- ThinkSystem 2.5" U.2 PM9D3a 960GB Read Intensive NVMe PCIe 5.0 x4 HS SSD, 4XB7A93066
- ThinkSystem 2.5" U.2 PM9D3a 1.92TB Read Intensive NVMe PCIe 5.0 x4 HS SSD, 4XB7A93067
- ThinkSystem 2.5" U.2 PM9D3a 3.84TB Read Intensive NVMe PCIe 5.0 x4 HS SSD, 4XB7A93068
- ThinkSystem 2.5" U.2 PM9D3a 7.68TB Read Intensive NVMe PCIe 5.0 x4 HS SSD, 4XB7A93069
- ThinkSystem 2.5" U.2 PM9D3a 15.36TB Read Intensive NVMe PCIe 5.0 x4 HS SSD, 4XB7A93095
- Added the following Mixed Use NVMe SSDs - Internal drive options section:
- ThinkSystem 2.5" U.2 PM9D5a 800GB Mixed Use NVMe NVMe PCIe 5.0 x4 HS SSD, 4XB7A93097
- ThinkSystem 2.5" U.2 PM9D5a 1.6TB Mixed Use NVMe NVMe PCIe 5.0 x4 HS SSD, 4XB7A93098
- ThinkSystem 2.5" U.2 PM9D5a 3.2TB Mixed Use NVMe NVMe PCIe 5.0 x4 HS SSD, 4XB7A93099
- ThinkSystem 2.5" U.2 PM9D5a 6.4TB Mixed Use NVMe NVMe PCIe 5.0 x4 HS SSD, 4XB7A93100
- ThinkSystem 2.5" U.2 PM9D5a 12.8TB Mixed Use NVMe NVMe PCIe 5.0 x4 HS SSD, 4XB7A93101
Changes in the April 13, 2025 update:
- New option for a OCP slot filler (slot cover) - OCP slot filler section
- ThinkSystem OCP3 FILLER, 4XF7B06188
Changes in the April 9, 2025 update:
- The server now supports a memory bus speed of 6400 MHz with 5th Gen AMD EPYC processors (specific DIMMs required) - Processors section
- Added the following memory DIMM - Memory options section
- ThinkSystem 32GB TruDDR5 6400MHz (1Rx4) RDIMM-A v2
Changes in the March 17. 2025 update:
- The following OCP adapter is supported - Network adapters section:
- ThinkSystem Intel E810-DA4 10/25GbE SFP28 4-Port OCP Ethernet Adapter, 4XC7A80269
Changes in the February 25, 2025 update:
- Added the following Read Intensive SSDs - Internal drive options section:
- ThinkSystem 2.5" U.2 PS1010 1.92TB Read Intensive NVMe PCIe 5.0 x4 HS SSD, 4XB7A97900
- ThinkSystem 2.5" U.2 PS1010 3.84TB Read Intensive NVMe PCIe 5.0 x4 HS SSD, 4XB7A97901
- ThinkSystem 2.5" U.2 PS1010 7.68TB Read Intensive NVMe PCIe 5.0 x4 HS SSD, 4XB7A97902
- ThinkSystem 2.5" U.2 PS1010 15.36TB Read Intensive NVMe PCIe 5.0 x4 HS SSD, 4XB7A97903
- ThinkSystem 2.5" U.2 BM1743 15.36TB Read Intensive NVMe PCIe 5.0 x4 HS SSD, 4XB7B02475
- ThinkSystem 2.5" U.2 BM1743 30.72TB Read Intensive NVMe PCIe 5.0 x4 HS SSD, 4XB7B02406
- ThinkSystem 2.5" U.2 BM1743 61.44TB Read Intensive NVMe PCIe 5.0 x4 HS SSD, 4XB7B02407
- Added the following Mixed Use SSDs - Internal drive options section:
- ThinkSystem 2.5" U.2 PS1030 1.6TB Mixed Use NVMe PCIe 5.0 x4 HS SSD, 4XB7A97904
- ThinkSystem 2.5" U.2 PS1030 3.2TB Mixed Use NVMe PCIe 5.0 x4 HS SSD, 4XB7A97905
- ThinkSystem 2.5" U.2 PS1030 6.4TB Mixed Use NVMe PCIe 5.0 x4 HS SSD, 4XB7A97906
- ThinkSystem 2.5" U.2 PS1030 12.8TB Mixed Use NVMe PCIe 5.0 x4 HS SSD, 4XB7A97907
Changes in the February 6, 2025 update:
- The server now supports 4x NVIDIA L4 GPUs with either 4th Gen and 5th Gen AMD EPYC processors - GPU adapters section
Changes in the January 18, 2025 update:
- Added operating environment and water flow information for configurations using open-loop cooling - Operating environment section
Changes in the January 17, 2025 update:
- Added the following 2.5-inch NVMe SSDs - Internal drive options section:
- ThinkSystem 2.5" U.2 Solidigm P5520 1.92TB Read Intensive NVMe PCIe 4.0 x4 HS SSD, 4XB7B01867
- ThinkSystem 2.5" U.2 Solidigm P5520 3.84TB Read Intensive NVMe PCIe 4.0 x4 HS SSD, 4XB7B01868
- ThinkSystem 2.5" U.2 Solidigm P5520 7.68TB Read Intensive NVMe PCIe 4.0 x4 HS SSD, 4XB7B01869
- ThinkSystem 2.5" U.2 Solidigm P5520 15.36TB Read Intensive NVMe PCIe 4.0 x4 HS SSD, 4XB7B01870
- ThinkSystem 2.5" U.2 Solidigm P5620 1.6TB Mixed Use NVMe PCIe 4.0 x4 HS SSD, 4XB7B01879
- ThinkSystem 2.5" U.2 Solidigm P5620 3.2TB Mixed Use NVMe PCIe 4.0 x4 HS SSD, 4XB7B01880
- ThinkSystem 2.5" U.2 Solidigm P5620 6.4TB Mixed Use NVMe PCIe 4.0 x4 HS SSD, 4XB7B01881
- ThinkSystem 2.5" U.2 Solidigm P5620 12.8TB Mixed Use NVMe PCIe 4.0 x4 HS SSD, 4XB7B01882
Changes in the January 12, 2025 update:
- Added M.2 and 7mm with Broadcom integrated RAID to the storage configuration tables - Storage configurations section
Changes in the January 7, 2025 update:
- Added the following HBA and RAID adapters - Controllers for internal storage section:
- ThinkSystem 4450-16i SAS/SATA PCIe Gen4 24Gb HBA, 4Y37A97938
- ThinkSystem RAID 5450-16i PCIe Gen4 24Gb Adapter, 4Y37A97936
- ThinkSystem RAID 9450-8i 4GB Flash PCIe Gen4 24Gb Adapter, 4Y37A97935
- ThinkSystem RAID 9450-16i 8GB Flash PCIe Gen4 24Gb Adapter, 4Y37A97937
- ThinkSystem RAID 9450-32i 8GB Flash PCIe Gen4 24Gb Adapter, 4Y37A97940
- Added storage configurations that use these new adapters - Storage configurations section
- 20-5, 30-5, 30-6
- Added a column to the backplane table (Table 17) indicating 24Gb SAS support - Front drive bays section
Changes in the December 17, 2024 update:
- Added the following RAID adapters - Controllers for internal storage section:
- ThinkSystem RAID 940-8i 8GB Flash PCIe Gen4 12Gb Adapter, 4Y37A09729
- ThinkSystem RAID 940-8i 8GB Flash PCIe Gen4 12Gb Adapter for U.3, BGM0
Changes in the November 26, 2024 update:
- Added Rear I/O slot configurations with 1x Gen5 slot (NVIDIA L4 GPU support) with either a Gen4 slot or 7mm drive support - Rear slots section
- Added the following Riser 1 kit for field upgrades - Rear slots section:
- ThinkSystem SR635 V3/SR645 V3 x16 PCIe Gen5 Riser 1 Option Kit, 4XH7A83842
Changes in the November 22, 2024 update:
- Added the following drive bay filler option - Field upgrades section:
- ThinkSystem 2.5" 1x1 HDD Filler by 8 units, 4XH7A99569
Changes in the November 10, 2024 update:
- Added a column to the GPU table indicating which GPUs are Controlled - GPU adapters section
Changes in the November 8, 2024 update:
- The following power supply is withdrawn from marketing - Power supplies section
- ThinkSystem 1100W -48V DC Hot-Swap Gen2 Power Supply, 4P57A26296
Changes in the October 29, 2024 update:
- Added the following ESXi preload - Operating system support section:
- VMware ESXi 8.0 U3 (Factory Installed), BZ97
Changes in the October 17, 2024 update:
- Added buttons to easily open a 360° view of the server and the full 3D Tour of the server - Introduction section
Changes in the October 10, 2024 update:
- New support for 5th Gen AMD EPYC 9005 Series processors - Processors section
- New support for 6400MHz memory (operating at 6000MHz) - Memory options section
- New support for Neptune Core open-loop water cooling - Lenovo Processor Neptune Core Module - Open-loop liquid cooling section
- New Gen5 Front PCIe risers - Front slots section:
- ThinkSystem V3 1U Front x16 FHFL PCIe Gen5 Riser, C1PQ
- ThinkSystem SR630 V3/SR635 V3 1X16 LP FL Front PCIe Gen5 Riser, C1PR
- Updated the quantities and slot locations of supported GPUs - GPU adapters section
- Added the Water infrastructure for the Lenovo Neptune Processor DWC Module section
- Added the RM100 In-Rack Coolant Distribution Unit section
- Added OS support for the new processors - Operating system support section
Changes in the September 17, 2024 update:
- Added the following rail kits - Rack installation section:
- ThinkSystem Toolless Stab-in Slide Rail Kit V3, 4XF7A99129
- ThinkSystem Toolless Stab-in Slide Rail Kit V3 with 1U CMA, 4XF7A99130
Changes in the September 9, 2024 update:
- Corrected the quantity and slot placement of the following adapters - Network adapters section:
- ThinkSystem Broadcom 57508 100GbE QSFP56 2-Port PCIe 4 Ethernet Adapter, 4XC7A08297
- ThinkSystem Mellanox ConnectX-6 Dx 100GbE QSFP56 2-port PCIe Ethernet Adapter, 4XC7A08248
- ThinkSystem Mellanox ConnectX-6 HDR/200GbE QSFP56 1-port PCIe 4 VPI Adapter, 4C57A15326
- ThinkSystem NVIDIA ConnectX-7 NDR200/200GbE QSFP112 2-port PCIe Gen5 x16 Adapter, 4XC7A81883
- ThinkSystem NVIDIA ConnectX-7 NDR OSFP400 1-Port PCIe Gen5 x16 InfiniBand Adapter, 4XC7A80289
- ThinkSystem Intel E810-DA4 10/25GbE SFP28 4-Port PCIe Ethernet Adapter, 4XC7A80267
Changes in the August 27, 2024 update:
- Added the following M.2 drive - Internal drive options section:
- ThinkSystem M.2 7450 PRO 480GB Read Intensive NVMe PCIe 4.0 x4 NHS SSD, 4XB7A82636
Changes in the August 21, 2024 update:
- The following adapter can now be included in CTO orders - Controllers for internal storage section:
- ThinkSystem RAID 5350-8i PCIe 12Gb Internal Adapter, 4Y37A84028
Changes in the August 6, 2024 update:
- Added the following RDIMM memory option - Memory options section
- ThinkSystem 128GB TruDDR5 5600MHz (2Rx4) RDIMM-A, 4X77A96982
Changes in the July 10, 2024 update:
- The following storage adapters are currently not available in CTO orders; they are only available for field upgrades - Controllers for internal storage section
- ThinkSystem 4350-8i SAS/SATA 12Gb HBA, 4Y37A72480
- ThinkSystem RAID 5350-8i PCIe 12Gb Internal Adapter, 4Y37A84028
- ThinkSystem RAID 9350-16i 4GB Flash PCIe 12Gb Internal Adapter, 4Y37A72486
Changes in the June 4, 2024 update:
- Added the following Rail Kits - Rack installation section:
- ThinkSystem Toolless Slide Rail Kit v2 Enhanced, 4M17A11755
- ThinkSystem Toolless Slide Rail Kit v2 Enhanced with 1U CMA, 4XF7A89443
Changes in the May 22, 2024 update:
- Removed the 2.5-inch drives as not announced - Internal drive options section:
- ThinkSystem 2.5" ER3 240GB Read Intensive SATA 6Gb HS SSD, 4XB7A90868
- ThinkSystem 2.5" ER3 480GB Read Intensive SATA 6Gb HS SSD, 4XB7A90869
- ThinkSystem 2.5" ER3 960GB Read Intensive SATA 6Gb HS SSD, 4XB7A90870
- ThinkSystem 2.5" ER3 1.92TB Read Intensive SATA 6Gb HS SSD, 4XB7A90871
- ThinkSystem 2.5" ER3 3.84TB Read Intensive SATA 6Gb HS SSD, 4XB7A95567
Changes in the May 17, 2024 update:
- Added the following GPU
- ThinkSystem NVIDIA L4 24GB PCIe Gen4 Passive GPU, 4X67A84824
- The serial port is only supported in slot 3 - Serial port section
Changes in the May 14, 2024 update:
- Added the following SATA SSDs - Internal drive options section:
- ThinkSystem 2.5" ER3 240GB Read Intensive SATA 6Gb HS SSD, 4XB7A90868
- ThinkSystem 2.5" ER3 480GB Read Intensive SATA 6Gb HS SSD, 4XB7A90869
- ThinkSystem 2.5" ER3 960GB Read Intensive SATA 6Gb HS SSD, 4XB7A90870
- ThinkSystem 2.5" ER3 1.92TB Read Intensive SATA 6Gb HS SSD, 4XB7A90871
- ThinkSystem 2.5" ER3 3.84TB Read Intensive SATA 6Gb HS SSD, 4XB7A95567
- Added the following NVMe SSDs - Internal drive options section:
- ThinkSystem 2.5" U.2 P5336 15.36TB Read Intensive NVMe PCIe 4.0 x4 HS SSD, 4XB7A95048
- ThinkSystem 2.5" U.2 P5336 7.68TB Read Intensive NVMe PCIe 4.0 x4 HS SSD, 4XB7A95047
- ThinkSystem 2.5" U.3 7500 MAX 800GB Mixed Use NVMe PCIe 4.0 x4 HS SSD, 4XB7A95054
- ThinkSystem 2.5" U.3 7500 PRO 960GB Read Intensive NVMe PCIe 4.0 x4 HS SSD, 4XB7A95049
Changes in the April 23, 2024 update:
- Added the following AMD processor feature for CTO orders - Platform Secure Boot section
- Platform Secure Boot Enable, C0DF
- Added the following memory DIMMs - Memory options section:
- ThinkSystem 48GB TruDDR5 4800MHz (2Rx8) RDIMM-A, 4X77A81447
- ThinkSystem 256GB TruDDR5 4800MHz (8Rx4) 3DS RDIMM-A v1, BZPN
- Added the following OCP network adapter - Network adapters section:
- ThinkSystem Intel I350 1GbE RJ45 4-Port OCP Ethernet Adapter V2, 4XC7A88428
- Added the following M.2 cable kit - M.2 field upgrades section:
- ThinkSystem SR635 V3 M.2 RAID B540i-2i SATA/NVMe Cable Kit, 4X97A94121
- Added the following NVMe drives - Internal drive options section:
- ThinkSystem 2.5" U.2 P5336 30.72TB Read Intensive NVMe PCIe 4.0 x4 HS SSD, 4XB7A93075
- ThinkSystem 2.5" U.2 P5336 61.44TB Read Intensive NVMe PCIe 4.0 x4 HS SSD, 4XB7A93076
- ThinkSystem 2.5" U.3 7500 MAX 1.6TB Mixed Use NVMe PCIe 4.0 x4 HS SSD, 4XB7A95055
- ThinkSystem 2.5" U.3 7500 MAX 3.2TB Mixed Use NVMe PCIe 4.0 x4 HS SSD, 4XB7A95056
- ThinkSystem 2.5" U.3 7500 MAX 6.4TB Mixed Use NVMe PCIe 4.0 x4 HS SSD, 4XB7A95057
- ThinkSystem 2.5" U.3 7500 MAX 12.8TB Mixed Use NVMe PCIe 4.0 x4 HS SSD, 4XB7A95058
- ThinkSystem 2.5" U.3 7500 PRO 1.92TB Read Intensive NVMe PCIe 4.0 x4 HS SSD, 4XB7A95050
- ThinkSystem 2.5" U.3 7500 PRO 3.84TB Read Intensive NVMe PCIe 4.0 x4 HS SSD, 4XB7A95051
- ThinkSystem 2.5" U.3 7500 PRO 7.68TB Read Intensive NVMe PCIe 4.0 x4 HS SSD, 4XB7A95052
- ThinkSystem 2.5" U.3 7500 PRO 15.36TB Read Intensive NVMe PCIe 4.0 x4 HS SSD, 4XB7A95053
- The server now supports up to 737.28TB using 12x 61.44TB 2.5-inch NVMe SSDs - Standard specifications section
- Added the following MicroSD card for local XCC storage - System I/O Board section
- ThinkSystem MicroSD 64GB Class 10 Flash Memory Card, 4X77A92672
Changes in the March 19, 2024 update:
- The following adapter is no longer supported in this server - Network adapters section
- ThinkSystem Intel E810-DA4 10/25GbE SFP28 4-Port OCP Ethernet Adapter, 4XC7A80269
Changes in the March 18, 2024 update:
- Updated the Ambient temperature requirements section
Changes in the March 5, 2024 update:
- Added the following drives - Internal drive options section:
- Read Intensive PCIe Gen 5 NVMe SSDs
- ThinkSystem 2.5" U.2 CD8P 1.92TB Read Intensive NVMe PCIe 5.0 x4 HS SSD, 4XB7A93480
- ThinkSystem 2.5" U.2 CD8P 3.84TB Read Intensive NVMe PCIe 5.0 x4 HS SSD, 4XB7A93481
- ThinkSystem 2.5" U.2 CD8P 7.68TB Read Intensive NVMe PCIe 5.0 x4 HS SSD, 4XB7A93482
- ThinkSystem 2.5" U.2 CD8P 15.36TB Read Intensive NVMe PCIe 5.0 x4 HS SSD, 4XB7A93483
- ThinkSystem 2.5" U.2 CD8P 30.72TB Read Intensive NVMe PCIe 5.0 x4 HS SSD, 4XB7A93484
- ThinkSystem 2.5" U.2 VA 1.92TB Read Intensive NVMe PCIe 5.0 x4 HS SSD, 4XB7A93122
- ThinkSystem 2.5" U.2 VA 3.84TB Read Intensive NVMe PCIe 5.0 x4 HS SSD, 4XB7A93123
- ThinkSystem 2.5" U.2 VA 7.68TB Read Intensive NVMe PCIe 5.0 x4 HS SSD, 4XB7A93124
- ThinkSystem 2.5" U.2 VA 15.36TB Read Intensive NVMe PCIe 5.0 x4 HS SSD, 4XB7A93125
- Read Intensive PCIe Gen 4 NVMe SSDs
- ThinkSystem 2.5" U.2 VA 1.92TB Read Intensive NVMe PCIe 4.0 x4 HS SSD, 4XB7A93892
- ThinkSystem 2.5" U.2 VA 3.84TB Read Intensive NVMe PCIe 4.0 x4 HS SSD, 4XB7A93893
- ThinkSystem 2.5" U.2 VA 7.68TB Read Intensive NVMe PCIe 4.0 x4 HS SSD, 4XB7A93894
- ThinkSystem 2.5" U.2 VA 15.36TB Read Intensive NVMe PCIe 4.0 x4 HS SSD, 4XB7A93895
- Mixed Use PCIe Gen 5 NVMe SSDs
- ThinkSystem 2.5" U.2 CD8P 1.6TB Mixed Use NVMe PCIe 5.0 x4 HS SSD, 4XB7A93888
- ThinkSystem 2.5" U.2 CD8P 3.2TB Mixed Use NVMe PCIe 5.0 x4 HS SSD, 4XB7A93889
- ThinkSystem 2.5" U.2 CD8P 6.4TB Mixed Use NVMe PCIe 5.0 x4 HS SSD, 4XB7A93890
- ThinkSystem 2.5" U.2 CD8P 12.8TB Mixed Use NVMe PCIe 5.0 x4 HS SSD, 4XB7A93891
- ThinkSystem 2.5" U.2 VA 1.6TB Mixed Use NVMe PCIe 5.0 x4 HS SSD, 4XB7A93127
- ThinkSystem 2.5" U.2 VA 3.2TB Mixed Use NVMe PCIe 5.0 x4 HS SSD, 4XB7A93128
- ThinkSystem 2.5" U.2 VA 6.4TB Mixed Use NVMe PCIe 5.0 x4 HS SSD, 4XB7A93129
- ThinkSystem 2.5" U.2 VA 12.8TB Mixed Use NVMe PCIe 5.0 x4 HS SSD, 4XB7A93130
- Mixed Use PCIe Gen 4 NVMe SSDs
- ThinkSystem 2.5" U.2 VA 1.6TB Mixed Use NVMe PCIe 4.0 x4 HS SSD, 4XB7A93896
- ThinkSystem 2.5" U.2 VA 3.2TB Mixed Use NVMe PCIe 4.0 x4 HS SSD, 4XB7A93897
- ThinkSystem 2.5" U.2 VA 6.4TB Mixed Use NVMe PCIe 4.0 x4 HS SSD, 4XB7A93898
- ThinkSystem 2.5" U.2 VA 12.8TB Mixed Use NVMe PCIe 4.0 x4 HS SSD, 4XB7A93899
- Read Intensive SATA SSDs
- ThinkSystem 2.5" PM893a 7.68TB Read Intensive SATA 6Gb HS SSD, 4XB7A87528
Changes in the February 13, 2024 update:
- New feature for CTO orders to disable Platform Secure Boot (PSB) - Processors section
- Platform Secure Boot Disable, C18D
- Added the following 7mm enablement kit with integrated Broadcom RAID - Rear 2.5-inch and 7mm drive bays and Field upgrades section:
- ThinkSystem 7mm SATA/NVMe 2-Bay Rear Hot-Swap RAID Enablement Kit, BYFG
- ThinkSystem SR635 V3/SR645 V3 7mm RAID B540p-2HS SATA/NVMe Enablement Kit, 4XH7A93166
- Added the following M.2 adapter with integrated Broadcom RAID - M.2 drives section:
- ThinkSystem M.2 RAID B540i-2i SATA/NVMe Adapter, 4Y37A90063
- New power supply option - Power supplies section
- ThinkSystem 750W 230V Titanium Hot-Swap Gen2 Power Supply v4, feature C07V
Changes in the December 5, 2023 update:
- Added the following memory DIMM - Memory options section:
- ThinkSystem 256GB TruDDR5 4800MHz (8Rx4) 3DS RDIMM-A v2, 4X77A81444
- Using 256GB DIMMs, the server now supports up to 3TB of memory - Standard specifications section
- New PCIe Gen5 slot risers - I/O expansion section:
- ThinkSystem V3 1U x16 PCIe Gen5 Riser2 v2, BVHN
- ThinkSystem V3 1U x16/x16 BF PCIe Gen5 Riser1, BLKB
- Added the following network adapters - Network adapters section:
- ThinkSystem AMD X3522 10/25GbE DSFP28 2-Port PCIe Ethernet Adapter (Low Latency), 4XC7A84827
- New 2.5-inch SATA SSD drive options - Internal drive options section:
- ThinkSystem 2.5" VA 240GB Read Intensive SATA 6Gb HS SSD v2, 4XB7A90872
- ThinkSystem 2.5" VA 480GB Read Intensive SATA 6Gb HS SSD v2, 4XB7A90873
- ThinkSystem 2.5" VA 960GB Read Intensive SATA 6Gb HS SSD v2, 4XB7A90874
- ThinkSystem 2.5" VA 1.92TB Read Intensive SATA 6Gb HS SSD v2, 4XB7A90875
- ThinkSystem 2.5" VA 3.84TB Read Intensive SATA 6Gb HS SSD v2, 4XB7A90876
- ThinkSystem 2.5" VA 7.68TB Read Intensive SATA 6Gb HS SSD v2, 4XB7A90877
- ThinkSystem 2.5" VA 480GB Mixed Use SATA 6Gb HS SSD v2, 4XB7A90884
- ThinkSystem 2.5" VA 960GB Mixed Use SATA 6Gb HS SSD v2, 4XB7A90885
- ThinkSystem 2.5" VA 1.92TB Mixed Use SATA 6Gb HS SSD v2, 4XB7A90886
- ThinkSystem 2.5" VA 3.84TB Mixed Use SATA 6Gb HS SSD v2, 4XB7A90887
- New M.2 drive options - Internal drive options section:
- ThinkSystem M.2 ER3 240GB Read Intensive SATA 6Gb NHS SSD, 4XB7A89422
- ThinkSystem M.2 ER3 480GB Read Intensive SATA 6Gb NHS SSD, 4XB7A90049
- ThinkSystem M.2 ER3 960GB Read Intensive SATA 6Gb NHS SSD, 4XB7A90230
- ThinkSystem M.2 PM9A3 960GB Read Intensive NVMe PCIe 4.0 x4 NHS SSD, 4XB7A90102
Changes in the November 28, 2023:
- New listing of available Seller Training Courses for Lenovo sellers and business partners that are related to the SR635 V3 - Seller training courses section
Changes in the October 31, 2023 update:
- Added the VMware ESXi 8.0 U2 preload - Operating system support section
Changes in the August 29, 2023 update:
- Added the following memory DIMMs - Memory options section:
- ThinkSystem 96GB TruDDR5 4800MHz (2Rx4) 10x4 RDIMM-A, 4X77A81448
- ThinkSystem 128GB TruDDR5 4800MHz (4Rx4) 3DS RDIMM-A, BYEE (CTO only)
Changes in the July 18, 2023 update:
- Added support for the following AMD EPYC "Bergamo" processors - Processors section:
- ThinkSystem AMD EPYC 9754 128C 360W 2.25GHz Processor
- ThinkSystem AMD EPYC 9734 112C 340W 2.2GHz Processor
- The server now supports front PCIe slots for a total of 5 slots (only supported with CTO orders) - I/O expansion section
- New base feature code BQ7M for configurations with front PCIe slots - Base feature codes section
- New drive backplanes that support front PCIe slots - Front drive bays section:
- ThinkSystem V3 1U Front I/O 4x2.5" Gen5 AnyBay Backplane, feature BT1P
- ThinkSystem V3 1U 4x2.5" Gen4 NVMe Backplane with 4x2.5" Chassis, feature BV8J
- ThinkSystem V3 1U Front I/O 4x2.5" Gen5 NVMe Backplane, feature BT1Q
- Added the storage configurations that include support for front PCIe slots - Storage configurations section
- Added the following adapter - Network adapters section
- ThinkSystem NVIDIA ConnectX-7 NDR200/200GbE QSFP112 2-port PCIe Gen5 x16 Adapter, 4XC7A81883
- New security bezel - Security section
- ThinkSystem V3 1U Security Bezel Option Kit, 4XH7A90346
- Added support for the following ESXi preload for CTO orders - Operating system support section:
- VMware ESXi 8.0 U1 (Factory Installed), BQ8S
Changes in the July 5, 2023 update:
- Updated the storage configurations - Storage configurations section
Changes in the June 20, 2023 update:
- Update the requirements regarding the closed-loop liquid-cooled heatsink
- Thermal requirements by processor section
- Closed-loop liquid-cooled heatsink section
Changes in the June 16, 2023 update:
- New support for the following M.2 adapter with integrated RAID - M.2 drives section
- ThinkSystem M.2 NVMe 2-Bay RAID Adapter, 4Y37A09750
- New support for the following 7mm kit with integrated RAID - Rear 2.5-inch and 7mm drive bays section:
- ThinkSystem 1U 7mm Drive Kit w/ NVMe RAID , B8Q2
- New field upgrades for 7mm drive bays upgrades section
- ThinkSystem SR635 V3 7mm NVMe 2-Bay RAID Enablement Kit, 4XH7A88532
Changes in the June 13, 2023 update:
- Added new processors (planned for July 2023) - Processors section:
- 4th Gen AMD EPYC processors with Zen 4c architecture (formerly codenamed "Bergamo")
Changes in the June 11, 2023 update:
- Added a section for available preconfigured models, by geography - Models section
Changes in the June 1, 2023 update:
- Added ambient temperature requirements - Operating environment section
Changes in the April 18, 2023 update:
- Added the following field upgrade - Upgrades to an Internal (CFF) HBA/RAID adapter section
- ThinkSystem SR635 V3 Internal RAID Adapter Backplane Cable Kit, 4X97A86323
Changes in the April 3, 2023 update:
- The server now supports Windows 10 and Windows 11, however only a subset of adapters and drives are supported
- New CTO base models - Models section
- Information about supported and non-supported adapters - Operating system support section
- Additional column added to part number tables in these sections:
Changes in the March 21, 2023 update:
- New M.2 option part number for field upgrades - M.2 field upgrades section:
- ThinkSystem SR635 V3 M.2 SATA/NVMe Cable Kit, 4X97A87900
Changes in the March 7, 2023 update:
- The following M.2 adapter is supported - M.2 drives section:
- ThinkSystem M.2 SATA/NVMe 2-Bay Enablement Kit, 4Y37A09738
- Corrections to the backplane selections for various NVMe and AnyBay storage configurations - Storage configurations section
- Updated the feature codes needed for config C in Table 35 - I/O expansion section
- The RAID adapter used for 7mm or M.2 RAID support can be installed in slot 1 or slot 2 - Rear 2.5-inch and 7mm drive bays section and M.2 drives section
Changes in the March 1, 2023 update:
- Corrected the part number for the serial port option kit - Serial port section
- ThinkSystem COM Port Upgrade Kit, 4X97A82921
First published: February 21, 2023
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