Power and Performance

Power and Performance

The following table lists the power and performance BIOS settings that you can configure through a BIOS policy or the default BIOS settings:

Name

Description

Supported Attributes

Versions

Platforms

Values

Dependencies
Optimized Power Mode

Automatically varies processor speed and power usage based on processor utilization to increase performance per watt. Most effective under moderate utilization.

4.3(2) and later

C220 M7, C240 M7, X210c M7, X410c M7

Disabled, Enabled

  • Disabled—This option is Disabled.

  • Enable—This options is enabled.
C1 Auto Demotion

If enabled, CPU automatically demotes to C1 based on un-core auto-demote information.

4.0(2) and later

C220 M6, C240 M6, B200 M6, X210c M6, C220 M7, C240 M7, X210c M7, X410c M7

Disabled, Enabled, Auto

  • Disabled—This option is Disabled.

  • Enable—This options is enabled.
C1 Auto UnDemotion

Select whether to enable processors to automatically undemote from C1.

4.0(2) and later

C220 M6, C240 M6, B200 M6, X210c M6, C220 M7, C240 M7, X210c M7, X410c M7

Disabled, Enabled, Auto

  • Disabled—This option is Disabled.

  • Enable—This options is enabled.
Core Performance Boost

Whether the AMD processor increases its frequency on some cores when it is idle or not being used much

4.0(2) and later

C125 M5, C225 M6, C245 M6, C225 M8, C245 M8, X215c M8

Disabled, Auto

  • Disabled—This option is Disabled.

  • Auto—The CPU automatically determines how to boost performance.
Global C State Control

Whether the AMD processors control IO-based C-state generation and DF C-states.

4.0(2) and later

C125 M5, C225 M6, C245 M6, C225 M8, C245 M8, X215c M8

Auto, Disabled, Enabled

  • Auto—This options is set to auto mode.

  • Disabled—This option is Disabled.

  • Enable—This options is enabled.
Ln Stream HW Prefetcher, where n value is 1 and 2.

Whether the processor allows the AMD hardware prefetcher to speculatively fetch streams of data and instruction from memory into the L1 or L2 cache when necessary.

4.0(2) and later

C125 M5, C225 M6, C245 M6, C225 M8, C245 M8, X215c M8

Auto, Disabled, Enabled

  • Auto—This options is set to auto mode.

  • Disabled—This option is Disabled.

  • Enable—This options is enabled.
Determinism Slider

Allows AMD processors to determine how to operate.

4.0(2) and later

C125 M5, C225 M6, C245 M6,C225 M8, C245 M8, X215c M8

Auto, Performance, Power

  • Auto—The CPU automatically uses default power determinism settings.

  • Performance—Processor operates at the best performance in a consistent manner.

  • Power—Processor operates at the maximum allowable performance on a per die basis.
Efficiency Mode Enable

Allows you to configure power consumption based on efficiency.

4.0(2) and later

C225 M6, C245 M6

Auto, Enabled

  • Enabled—This option is enabled.

  • Auto—The CPU automatically uses default settings.
CPPC

Allows you to configure Collaborative Processor Performance Control.

4.0(2) and later

C225 M6, C245 M6, C225 M8, C245 M8, X215c M8

Auto, Disabled, Enabled

  • Enabled—This option is enabled.

  • Disbled—This option is disabled.

  • Auto—The CPU automatically uses default settings.

Enhanced CPU Performance

Enhances CPU performance by adjusting server settings automatically.

4.0(2) and later

C220 M6, C240 M6, B200 M6, X210c M6, C220 M7, C240 M7, X210c M7, X410c M7, C245 M8, X215c M8, C240 M8, X210c M8

Disabled, Auto

  • Disabled—This option is Disabled.

  • Auto—Allows to adjust server settings to increase the processor performance.

Note

 

Enabling this functionality may increase power consumption.

The server should meet the following requirements in order to use this functionality:

  • The server should not contain Barlow Pass DIMMs.

  • DIMM module size present in the Cisco UCS C220 M6 server should be less than 64GB and in Cisco UCS C240 M6 server should be less than 256GB.

  • No GPU cards are present in the server.
LLC Dead Line

In CPU non-inclusive cache scheme, Mid-Level Cache (MLC) evictions are filled into the Last-Level Cache (LLC). When lines are evicted from the MLC, the core can flag them as dead (not likely to be read again). The LLC has the option to drop dead lines and not fill them in the LLC.

4.0(2) and later

C220 M6, C240 M6, B200 M6, X210c M6, C220 M7, C240 M7, X210c M7, X410c M7, C220 M8, C240 M8, X210c M8

Disabled, Enabled, Auto

  • Disabled—The dead lines are always dropped and are never filled into the LLC.

  • Enable—Allows the LLC to fill dead lines into the LLC if there is free space available. This is the default option.

  • Auto—The CPU determines the LLC dead line allocation.
UPI Link Enablement

Enables the number of Ultra Path Interconnect (UPI) links required by the processor.

4.0(2) and later

C220 M6, C240 M6, B200 M6, X210c M6, C220 M7, C240 M7, X210c M7, X410c M7, C220 M8, C240 M8, X210c M8

Auto, 1, 2, 3

UPI Power Manangement

The UPI power management can be used for conserving power on the server.

4.0(2) and later

C220 M6, C240 M6, B200 M6, X210c M6, C220 M7, C240 M7, X210c M7, X410c M7, C220 M8, C240 M8, X210c M8

Disabled, Enabled

  • Disabled—This option is Disabled.

  • Enable—This options is enabled.

XPT Remote Prefetch

This feature allows an LLC request to be duplicated and sent to an appropriate memory controller in a remote machine based on the recent LLC history to reduce latency.

4.0(2) and later

C220 M6, C240 M6, B200 M6, X210c M6, C220 M7, C240 M7, X210c M7, X410c M7, C220 M8, C240 M8, X210c M8

Disabled, Enabled

  • Disabled—This option is Disabled.

  • Enable—This options is enabled.

  • Auto—The CPU determines the functionality.

Latency Optimized Mode

A set of BIOS settings that prioritize low latency and consistent performance over energy efficiency or other optimizations.

4.3(6a)

C220 M8, C240 M8, X210c M8

Disabled, Enabled

  • Disabled—Options are Disabled.

  • Enabled—Options are enabled.