Tuning UEFI Settings for Performance and Energy Efficiency on AMD Processor-Based ThinkSystem ServersPlanning / Implementation

23 Jun 2022
Form Number
PDF size
54 pages, 338 KB


Properly configuring UEFI parameters in a server is important for achieving a desired outcome such as maximum performance or maximum energy efficiency. This paper defines preset UEFI operating modes for Lenovo® ThinkSystem™ servers running AMD EPYC 7002 and 7003 Series processors that are optimized for each of these outcomes. In addition, a thorough explanation is provided for each of the UEFI parameters so they can be fine-tuned for any particular customer deployment.

This paper is for customers and for business partners and sellers wishing to understand how to optimize UEFI parameters to achieve maximum performance or energy efficiency of Lenovo ThinkSystem servers with second-generation and third-generation AMD EPYC processors.

Table of Contents

Summary of operating modes
UEFI menu items for SR635 and SR655
UEFI menu items for SR645 and SR665
Hidden UEFI Items for SR645 and SR665
Low Latency and Low Jitter UEFI parameter settings
ThinkSystem server platform design

To view the document, click the Download PDF button.

Change History

Changes in the June 2022 update:

  • Updated the Data Prefetcher sections
    • SR635 & SR655: “Data Prefetchers” on page 22
    • SR645 & SR665: “Data Prefetchers” on page 36
  • Added “PCIe Ten Bit Tag Support” on page 42

Related product families

Product families related to this document are the following: