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Abstract
Memory reliability, performance and quality are even more critical today as customers utilize greater memory capacities for Big Data Analytics, Cloud Computing, Virtualization, Database and High Performance Computing workloads. Lenovo offers TruDDR5 and TruDDR4 Memory portfolio for ThinkSystem servers which help dramatically improve workload performance.
Change History
Changes in the November 13, 2024:
- Added the link to the support tip documenting DDR5 memory backwards compatibility - Server Support section
Introduction
ThinkSystem TruDDR5 and TruDDR4 memory delivers trusted, tested, quality, performance, and reliability throughout the ThinkSystem portfolio. We use the highest quality industry-standard memory components sourced from Tier 1 DRAM suppliers. Only memory that meets these strict requirements are selected for memory in Lenovo servers. It is then compatibility tested and tuned on every ThinkSystem server to maximize reliability.
In addition, Lenovo memory DIMMs for servers have a unique signature programmed into them so your system can verify that TruDDR5 and TruDDR4 memory is installed in your system. Since the memory will be authenticated, memory stretch goals are enabled only when TruDDR4 memory DIMMs are detected. Together with lower power consumption, these new DIMMs can provide the lowest TCO for data centers.
Figure 1. Lenovo TruDDR4 memory DIMM
High Performance Memory
Lenovo offers high-performance and high-capacity memory options in ThinkSystem servers.
Performance+ Memory
Memory intensive workloads needing a competitive advantage will benefit from Lenovo’s Performance+ memory. Lenovo engineers worked in partnership with leading memory suppliers to develop and tune ThinkSystem servers enabling them to exceed the latest industry standard for memory performance.
In ThinkSystem V3 servers with 5th Gen Intel Xeon Scalable processors, Lenovo’s Performance+ memory delivers increased memory speed at up to 4800 MHz with two memory channels populated.
Persistent Memory
Lenovo ThinkSystem servers configured with Intel Optane Persistent Memory transforms the memory/storage hierarchy enabling faster insights from data. This breakthrough technology delivers large capacity, high speed, affordable memory with data persistence and advanced encryption capabilities. These modules significantly increase the capacity of available system memory, keeping more hot data closer to the CPU, and enabling greater operational efficiency by processing larger data sets with more user instances.
3DS RDIMMs
To meet the ever increasing demand for higher density server memory modules, Lenovo offers 3DS (3 Dimensional Stacked) DDR4 RDIMMs which apply TSV (Through Silicon Via) technology from our partnership with a leading Tier 1 DRAM supplier. The new TSV 3DS stack technology enables higher density DRAM stack packages with higher operational frequency and reduced power consumption. The RDIMM configuration along with 3DS TSV DRAM packages exhibits performance benefits and lower power consumption over alternative high density solutions to ultimately provide the lowest TCO for data centers.
Figure 2. Intel Optane Persistent Memory
Part Number Information
The following tables list the ordering information:
- 6400 MHz DDR5 memory for AMD servers
- 5600 MHz DDR5 memory for Intel servers
- 4800 MHz DDR5 memory for Intel servers
- 4800 MHz DDR5 memory for AMD servers
- 3200 MHz DDR4 memory for Intel servers
- 3200 MHz DDR4 memory for AMD servers
- 2933 MHz DDR4 memory for Intel servers
- 2933 MHz DDR4 memory for AMD servers
- 2666 MHz DDR4 memory
- Intel Optane Persistent Memory 300 Series (4400 MHz)
- Intel Optane Persistent Memory 200 Series (3200 MHz)
- Intel Optane Persistent Memory 100 Series (2666 MHz)
6400 MHz DDR5 memory for AMD servers
For more information on DDR5 memory, see the Lenovo Press paper, Introduction to DDR5 Memory, available from https://lenovopress.com/lp1618.
5600 MHz DDR5 memory for Intel servers
For more information on DDR5 memory, see the Lenovo Press paper, Introduction to DDR5 Memory, available from https://lenovopress.com/lp1618.
4800 MHz DDR5 memory for Intel servers
9x4 RDIMMs (also known as EC4 RDIMMs) are a new 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.
4800 MHz DDR5 memory for AMD servers
9x4 RDIMMs (also known as Optimized or EC4 RDIMMs) are a new 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.
3200 MHz DDR4 memory for Intel servers
3200 MHz DDR4 memory for AMD servers
2933 MHz DDR4 memory for Intel servers
2933 MHz DDR4 memory for AMD servers
2666 MHz DDR4 memory
Intel Optane Persistent Memory 300 Series (4400 MHz)
Intel Optane Persistent Memory 200 Series (3200 MHz)
Intel Optane Persistent Memory 100 Series (2666 MHz)
* Configure-to-order only, not available as a field upgrade.
Server Support
Configurations notes:
- Some 2666 MHz memory is only supported with Gen 1 Xeon Scalable processors (codenamed "Skylake"), whereas other 2666 MHz memory is only supported with Gen 2 Xeon Scalable processors (codenamed "Cascade Lake"). These are indicated with the (1) and (2) footnotes in the table, respectively.
- 2933 MHz memory is not supported by Intel Xeon SP Gen 1 processors
- The support of 32GB UDIMMs on ST50, ST250, SR150 and SR250 requires a Intel Xeon E Series processor and UEFI firmware ISE114H or later
- 2666 MHz Persistent Memory is only supported by Intel Xeon SP Gen 2 processors
- 3200 MHz Persistent Memory is only supported by Intel Xeon SP Gen 3 processors
- Some servers support mixing memory speeds; all memory will operate at the lowest speed
Note: Lenovo branded memory shipped as option part numbers, as FRU service parts, or installed in the factory as part of a CTO order, may contain memory parts that exceed the technical specification of what is printed on the DIMM label or is stated in the DIMM ordering information. Your server's system UEFI firmware may need to be updated to support such DIMMs.
See the following Lenovo Support Tips for additional information:
The following tables list the ThinkSystem servers that are compatible, grouped by server form factor or processor - Part 1, Part 2, Part 3, and Part 4.
- Only supported with second generation Intel Xeon Scalable processors ("Cascade Lake") and not supported with first generation Intel Xeon Scalable processors ("Skylake")
- Supported in the SR635 and SR655 only with an EPYC 7002 processor. Not supported with an EPYC 7003 processor.
- Only supported with first generation Intel Xeon Scalable processors ("Skylake") and not supported with second generation Intel Xeon Scalable processors ("Cascade Lake")
- Only supported with second generation Intel Xeon Scalable processors ("Cascade Lake") and not supported with first generation Intel Xeon Scalable processors ("Skylake")
- Only supported with first generation Intel Xeon Scalable processors ("Skylake") and not supported with second generation Intel Xeon Scalable processors ("Cascade Lake")
Operating system support
Most memory is operating system independent, however Persistent Memory is supported only by specific operating systems as listed in the following tables:
1 1. This item is not a general stand-alone option for Lenovo ThinkSystem SD650 (Xeon SP Gen 2), M/T 7X58 (Xeon SP Gen 2). 2. For OS support matrix, pls refer to LeSI Best Recipe. 3. This item shall be installed/removed by Lenovo support rep only.
2 When OCPMM (AEP) is installed, the maximum ambient temperature can be 30 °C. When operating above 30 °C, or in the event of a fan failure, the server will continue to function as long as all component temperature requirements are met, however, there may be performance reductions.Detail information please refer to Support Tip HT508512
Learn More
For more information, see these resources:
- Intel Optane DC Persistent Memory product guide
https://lenovopress.com/lp1066-intel-optane-dc-persistent-memory - Optimizing Memory Performance of Lenovo ThinkSystem Servers
https://lenovopress.com/lp0697-optimizing-memory-performance-of-lenovo-thinksystem-servers - Lenovo ThinkSystem SD530 Performance Considerations with 12 DIMMs and 16 DIMMs
https://lenovopress.com/lp0659-thinksystem-sd530-performance-considerations - ThinkSystem Memory Configurator
https://dcsc.lenovo.com/#/memory_configuration
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®
ThinkSystem®
The following terms are trademarks of other companies:
AMD is a trademark of Advanced Micro Devices, Inc.
Intel®, Intel Optane®, 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®, Windows Server®, and Windows® are trademarks of Microsoft Corporation 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 November 13, 2024:
- Added the link to the support tip documenting DDR5 memory backwards compatibility - Server Support section
Changes in the October 10, 2024 update:
- Added the following DIMMs - 6400 MHz DDR5 memory for AMD servers section:
- ThinkSystem 64GB TruDDR5 6400MHz (2Rx4) RDIMM-A, 4X77A93528
- ThinkSystem 32GB TruDDR5 6400MHz (1Rx4) RDIMM-A, 4X77A93526
- ThinkSystem 96GB TruDDR5 6400MHz (2Rx4) RDIMM-A, 4X77A93533
- ThinkSystem 128GB TruDDR5 6400MHz (2Rx4) RDIMM-A, 4X77A93529
- ThinkSystem 16GB TruDDR5 6400MHz (1Rx8) RDIMM-A, 4X77A93525
- ThinkSystem 32GB TruDDR5 6400MHz (2Rx8) RDIMM-A, 4X77A93527
- ThinkSystem 48GB TruDDR5 6400MHz (2Rx8) RDIMM-A, 4X77A93532
Changes in the September 3, 2024 update:
- Added the following DIMMs - 5600 MHz DDR5 memory for Intel servers section:
- ThinkSystem 128GB TruDDR5 5600MHz (2Rx4) RDIMM, 4X77A93887
- ThinkSystem 96GB TruDDR5 5600MHz (2Rx4) 10x4 RDIMM, 4X77B00033
- ThinkSystem 64GB TruDDR5 5600MHz (2Rx4) 10x4 RDIMM, 4X77B00032
Changes in the August 6, 2024 update:
- Added the following DIMM - 4800 MHz DDR5 memory for AMD servers section:
- ThinkSystem 128GB TruDDR5 5600MHz (2Rx4) RDIMM-A, 4X77A96982
Changes in the April 23, 2024 update:
- Added the following DIMM - 4800 MHz DDR5 memory for Intel servers section:
- ThinkSystem 48GB TruDDR5 4800MHz (2Rx8) RDIMM, 4X77A87033
Changes in the January 30, 2024 update:
- The following DIMM has been withdrawn:
- ThinkSystem 256GB TruDDR5 5600 MHz (8Rx4) 3DS RDIMM, 4X77A88055
Changes in the January 9, 2024 update:
- Added the following 4800 MHz RDIMMs for the SR950 V3:
- ThinkSystem SR950 V3 32GB TruDDR5 4800MHz (1Rx4) 10x4 RDIMM, 4X77A94004
- ThinkSystem SR950 V3 64GB TruDDR5 4800MHz (2Rx4) 10x4 RDIMM, 4X77A94006
- Added the following 4800 MHz UDIMMs:
- ThinkSystem 32GB TruDDR5 4800MHz (2Rx8) ECC UDIMM, 4X77A88512
- ThinkSystem 16GB TruDDR5 4800MHz (1Rx8) ECC UDIMM, 4X77A88511
Changes in the December 14, 2023 update:
- New 5600 MHz memory, for use with 5th Gen Intel Xeon Scalable processors - 5600 MHz DDR5 memory for Intel servers section:
- ThinkSystem 32GB TruDDR5 Performance+ 5600MHz (2Rx8) RDIMM, 4X77A90991
- ThinkSystem 64GB TruDDR5 Performance+ 5600MHz (2Rx4) RDIMM, 4X77A90992
- ThinkSystem 32GB TruDDR5 5600MHz (1Rx4) RDIMM, 4X77A88049
- ThinkSystem 64GB TruDDR5 5600MHz (2Rx4) RDIMM, 4X77A88052
- ThinkSystem 48GB TruDDR5 5600MHz (1Rx4) RDIMM, 4X77A88639
- ThinkSystem 96GB TruDDR5 5600MHz (2Rx4) RDIMM, 4X77A88058
- ThinkSystem 16GB TruDDR5 5600MHz (1Rx8) RDIMM, 4X77A88087
- ThinkSystem 32GB TruDDR5 5600MHz (2Rx8) RDIMM, 4X77A88051
- ThinkSystem 24GB TruDDR5 5600MHz (1Rx8) RDIMM, 4X77A88056
- ThinkSystem 48GB TruDDR5 5600MHz (2Rx8) RDIMM, 4X77A88057
- ThinkSystem 128GB TruDDR5 5600MHz (4Rx4) 3DS RDIMM, 4X77A88054
- ThinkSystem 256GB TruDDR5 5600 MHz (8Rx4) 3DS RDIMM, 4X77A88055
Changes in the December 5, 2023 update:
- Added the following DIMM:
- ThinkSystem 256GB TruDDR5 4800MHz (8Rx4) 3DS RDIMM-A v1, BZPN
Changes in the November 21, 2023 update:
- Added the following DIMM:
- ThinkSystem 256GB TruDDR5 4800MHz (8Rx4) 3DS RDIMM v1, BZPM
Changes in the November 7, 2023 update:
- Added the following 3200MHz DIMM:
- ThinkSystem 32GB TruDDR4 3200 MHz (2Rx4 1.2V) RDIMM Extended Temperature, 4X77A83361
Changes in the October 31, 2023 update:
- The following RDIMM is now available as an option part number - 4800 MHz DDR5 memory for Intel servers section
- ThinkSystem 96GB TruDDR5 4800MHz (2Rx4) RDIMM, 4X77A87034
Changes in the October 3, 2023 update:
- Added the following RDIMM - 4800 MHz DDR5 memory for Intel servers section
- ThinkSystem 96GB TruDDR5 4800MHz (2Rx4) RDIMM, BZC2
Changes in the August 29, 2023 update:
- Added the following DIMMs for ThinkSystem V3 servers (CTO only):
- ThinkSystem 128GB TruDDR5 4800MHz (4Rx4) 3DS RDIMM, BY8F
- ThinkSystem 128GB TruDDR5 5600MHz (4Rx4) 3DS RDIMM-A, BYEE
Changes in the July 24, 2023 update:
- Intel Optane Persistent Memory 100 Series is now withdrawn from marketing
Changes in the July 18, 2023 update:
- Added the following memory DIMMs for ThinkSystem V3 servers with AMD processors - 4800 MHz DDR5 memory for AMD servers section:
- ThinkSystem 24GB TruDDR5 4800MHz (1Rx8) RDIMM-A, 4X77A85812
- ThinkSystem 48GB TruDDR5 4800MHz (2Rx8) RDIMM-A, 4X77A81447
- ThinkSystem 96GB TruDDR5 4800MHz (2Rx4) 10x4 RDIMM-A, 4X77A81448
Changes in the February 14, 2023 update:
- Added the following memory DIMMs for the SE350:
- ThinkSystem SE350 16GB TruDDR4 3200 MHz (2Rx8 1.2V) RDIMM, 4X77A85855
- ThinkSystem SE350 32GB TruDDR4 3200 MHz (2Rx4 1.2V) RDIMM, 4X77A85861
Changes in the February 2, 2023 update:
- Intel Optane Persistent Memory 300 Series module are now withdrawn from marketing:
- ThinkSystem 128GB TruDDR5 4400MHz Intel Optane PMem, 4X77A75933
- ThinkSystem 256GB TruDDR5 4400MHz Intel Optane PMem, 4X77A75934
- ThinkSystem 512GB TruDDR5 4400MHz Intel Optane PMem, 4X77A75935
Changes in the January 31, 2023 update:
- Added the following DDR5 memory for ThinkSystem V3 servers with Intel processors - 4800 MHz DDR5 memory for Intel servers section:
- ThinkSystem 32GB TruDDR5 4800MHz (1Rx4) 9x4 RDIMM, 4X77A77483
- ThinkSystem 64GB TruDDR5 4800MHz (2Rx4) 9x4 RDIMM, 4X77A77033
- ThinkSystem 16GB TruDDR5 4800MHz (1Rx8) RDIMM, 4X77A77029
- ThinkSystem 32GB TruDDR5 4800MHz (1Rx4) 10x4 RDIMM, 4X77A77030
- ThinkSystem 32GB TruDDR5 4800MHz (2Rx8) RDIMM, 4X77A77031
- ThinkSystem 64GB TruDDR5 4800MHz (2Rx4) 10x4 RDIMM, 4X77A77032
- ThinkSystem 128GB TruDDR5 4800MHz (4Rx4) 3DS RDIMM, 4X77A77034
- ThinkSystem 256GB TruDDR5 4800MHz (8Rx4) 3DS RDIMM, 4X77A77035
- Added the following Persistent memory for ThinkSystem V3 servers with Intel processors - Intel Optane Persistent Memory 300 Series section:
- ThinkSystem 128GB TruDDR5 4400MHz Intel Optane PMem, 4X77A75933
- ThinkSystem 256GB TruDDR5 4400MHz Intel Optane PMem, 4X77A75934
- ThinkSystem 512GB TruDDR5 4400MHz Intel Optane PMem, 4X77A75935
Changes in the November 10, 2022 update:
- Added the following DDR5 memory for AMD servers:
- ThinkSystem 32GB TruDDR5 4800MHz (1Rx4) Optimized RDIMM-A, 4X77A81439
- ThinkSystem 64GB TruDDR5 4800MHz (2Rx4) Optimized RDIMM-A, 4X77A81442
- ThinkSystem 16GB TruDDR5 4800MHz (1Rx8) RDIMM-A, 4X77A81437
- ThinkSystem 32GB TruDDR5 4800MHz (1Rx4) RDIMM-A, 4X77A81438
- ThinkSystem 32GB TruDDR5 4800MHz (2Rx8) RDIMM-A, 4X77A81440
- ThinkSystem 64GB TruDDR5 4800MHz (2Rx4) RDIMM-A, 4X77A81441
- ThinkSystem 128GB TruDDR5 4800MHz (4Rx4) 3DS RDIMM-A, 4X77A81443
- ThinkSystem 256GB TruDDR5 4800MHz (8Rx4) 3DS RDIMM-A, 4X77A81444
Changes in the September 5, 2022 update:
- The following memory option is withdrawn from marketing:
- ThinkSystem 16GB TruDDR4 2666 MHz (1Rx4 1.2V) RDIMM, 7X77A01302
Changes in the July 28, 2022 update:
- The following memory option is withdrawn from marketing:
- ThinkSystem 64GB TruDDR4 2666MHz (4Rx4, 1.2V) 3DS RDIMM, 4ZC7A08716
Changes in the March 1, 2022 update:
- Added the following UDIMMs for the ST50 V2, ST250 V2 and SR250 V2:
- ThinkSystem 8GB TruDDR4 3200 MHz (1Rx8, 1.2V) ECC UDIMM, 4X77A77494
- ThinkSystem 16GB TruDDR4 3200 MHz (2Rx8, 1.2V) ECC UDIMM, 4X77A77495
- ThinkSystem 32GB TruDDR4 3200MHz (2Rx8, 1.2V) ECC UDIMM, 4X77A77496
Changes in the December 14, 2021 update:
- Added the following LRDIMM for the SE350:
- ThinkSystem 64GB TruDDR4 2666 MHz (4Rx4 1.2V) LRDIMM, 4X77A78614
Changes in the December 2, 2021 update:
- The following 2666 MHz DIMM is now withdrawn:
- ThinkSystem 128GB TruDDR4 2666 MHz (8Rx4 1.2V) 3DS RDIMM, 7X77A01307
Changes in the July 27, 2021 update:
- The 256GB Performance+ 2933MHz 3DS RDIMM is now available as an option part number - Table 3:
- ThinkSystem 256GB TruDDR4 Performance+ 2933MHz (8Rx4 1.2V) 3DS RDIMM, 4X77A64957
Changes in the February 12, 2021 update:
- The server support tables are now automatically updated (change history may not be updated) - Server support section
Changes in the November 24, 2020 update:
- The following memory option is supported in the SR635 and SR655 - Server support section:
- ThinkSystem 32GB TruDDR4 3200 MHz (2Rx8 1.2V) RDIMM-A, 4ZC7A15123
Changes in the November 6, 2020 update:
- Added OS support information for the - Operating system support section
Changes in the May 19, 2020 update:
- 2933 MHz Performance+ DIMMs up to 128GB now available as option part numbers for field upgrades - Part number information section
- ThinkSystem 16GB TruDDR4 Performance+ 2933MHz (2Rx8 1.2V) RDIMM, 4X77A12184
- ThinkSystem 32GB TruDDR4 Performance+ 2933MHz (2Rx4 1.2V) RDIMM, 4X77A12185
- ThinkSystem 64GB TruDDR4 Performance+ 2933MHz (2Rx4 1.2V) RDIMM, 4X77A12186
- ThinkSystem 128GB TruDDR4 Performance+ 2933MHz (4Rx4 1.2V) 3DS RDIMM, 4X77A12187
Changes in the May 5, 2020 update:
- New 3200 MHz memory options:
- ThinkSystem 32GB TruDDR4 3200MHz (2Rx8 1.2V) RDIMM, 4ZC7A15123
- ThinkSystem 128GB TruDDR4 3200MHz (2S2Rx4 1.2V) 3DS RDIMM, 4ZC7A15125
- ThinkSystem 32GB TruDDR4 Performance+ 3200 MHz (2Rx8 1.2V) RDIMM-A, 4X77A12188
- ThinkSystem 64GB TruDDR4 Performance+ 3200 MHz (2Rx4 1.2V) RDIMM-A, 4X77A12189
- Added SR665 and SR645 to the tables - Server support section
- In the Server support section, rearranged the tables so that all memory for a server is in one table
- Added operating system support information for Persistent Memory - Operating system support section
Changes in the February 18, 2020 update:
- New UDIMM memory option for SR150, SR250, ST250:
- ThinkSystem 32GB TruDDR4 2666MHz (2Rx8, 1.2V) ECC UDIMM, 4ZC7A15142
- The SR635, SR655 and SD530 support this memory option (effective February 25):
- ThinkSystem 128GB TruDDR4 2933MHz (4Rx4 1.2V) 3DS RDIMM, 4ZC7A15113
- The SR670 now supports this memory option (effective February 25):
- ThinkSystem 64GB TruDDR4 2933MHz (2Rx4 1.2V) RDIMM, 4ZC7A08710
Changes in the January 7, 2020 update:
- Added SR850P to the server support table - Server support section
Changes in the November 5, 2019 update:
- Added note that actual DIMM specifications may exceed the label or stated specifications - Server support section
Changes in the August 20, 2019 update:
- Added ThinkSystem SE350
Changes in the August 7, 2019 update:
- New 2933 MHz and 3200 MHz memory options for SR655 and SR635
Changes in the April 2, 2019 update:
- New 2933 MHz memory options
- New 2933 MHz Performance+ memory options
- New Intel Optane DC Persistent Memory options
- ThinkSystem 64GB TruDDR4 2666MHz (4Rx4, 1.2V) 3DS RDIMM (4ZC7A08716) now supported in SR650 and SR630 (second-generation processors only)
First published January 15, 2019
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