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 |
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Versions |
Platforms |
Values |
Dependencies |
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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) |
C220 M7, C240 M7, X210c M7, X410c M7 |
Disabled, Enabled
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C1 Auto Demotion |
If enabled, CPU automatically demotes to C1 based on un-core auto-demote information. |
4.0(2), 4.0(4), 4.1(1), 4.1(3), 4.2(1), 4.3(3a) |
All M5 servers, C220 M6, C240 M6, B200 M6, X210c M6, C220 M7, C240 M7, X210c M7, X410c M7 |
Disabled, Enabled, Auto
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C1 Auto UnDemotion |
Select whether to enable processors to automatically undemote from C1. |
4.0(2), 4.0(4), 4.1(1), 4.1(3), 4.2(1), 4.3(3a) |
All M5 servers, C220 M6, C240 M6, B200 M6, X210c M6, C220 M7, C240 M7, X210c M7, X410c M7 |
Disabled, Enabled, Auto
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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), 4.0(4), 4.1(1), 4.1(3), 4.2(1) |
C225 M6, C245 M6 |
Disabled, Auto
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Global C State Control |
Whether the AMD processors control IO-based C-state generation and DF C-states. |
4.0(2), 4.0(4), 4.1(1), 4.1(3), 4.2(1) |
C225 M6, C245 M6 |
Auto, Disabled, Enabled
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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), 4.0(4), 4.1(1), 4.1(3), 4.2(1) |
C225 M6, C245 M6 |
Auto, Disabled, Enabled
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Determinism Slider |
Allows AMD processors to determine how to operate. |
4.0(2), 4.0(4), 4.1(1), 4.1(3), 4.2(1) |
C225 M6, C245 M6 |
Auto, Performance, Power
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Efficiency Mode Enable |
Allows you to configure power consumption based on efficiency. |
4.0(2), 4.0(4), 4.1(1), 4.1(3), 4.2(1) |
C225 M6, C245 M6 |
Auto, Enabled
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CPPC |
Allows you to configure Collaborative Processor Performance Control. |
4.0(2), 4.0(4), 4.1(1), 4.1(3), 4.2(1) |
C225 M6, C245 M6 |
Auto, Disabled, Enabled
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cTDP Control |
Allows you to set customized value for Thermal Design Power (TDP). |
4.0(2), 4.0(4), 4.1(1), 4.1(3), 4.2(1) |
C225 M6, C245 M6 |
Auto, Manual
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Enhanced CPU Performance |
Enhances CPU performance by adjusting server settings automatically. |
4.0(2), 4.0(4), 4.1(1), 4.1(3), 4.2(1), 5.0(1), 5.0(2) |
C220 M6, C240 M6, B200 M6, X210c M6, C220 M7, C240 M7, X210c M7, X410c M7 |
Disabled, Auto
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The server should meet the following requirements in order to use this functionality:
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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), 4.0(4), 4.1(1), 4.1(3), 4.2(1) |
C220 M6, C240 M6, B200 M6, X210c M6, C220 M7, C240 M7, X210c M7, X410c M7 |
Disabled, Enabled, Auto
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UPI Link Enablement |
Enables the number of Ultra Path Interconnect (UPI) links required by the processor. |
4.0(2), 4.0(4), 4.1(1), 4.1(3), 4.2(1), 5.0(1), 5.0(2) |
All M5 servers, C220 M6, C240 M6, B200 M6, X210c M6, C220 M7, C240 M7, X210c M7, X410c M7 |
Auto, 1, 2, 3 |
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UPI Power Manangement |
The UPI power management can be used for conserving power on the server. |
4.0(2), 4.0(4), 4.1(1), 4.1(3), 4.2(1) |
All M5 servers, C220 M6, C240 M6, B200 M6, X210c M6, C220 M7, C240 M7, X210c M7, X410c M7 |
Disabled, Enabled
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Virtual NUMA |
The Virtual NUMA (virtual non-uniform memory access) is a memory-access optimization method for VMware virtual machines (VMs), which helps prevent memory-bandwidth bottlenecks. |
4.0(2), 4.0(4), 4.1(1), 4.1(3), 4.2(1), 5.0(1), 5.0(2) |
All M5 servers, C220 M6, C240 M6, B200 M6, X210c M6, C220 M7, C240 M7, X210c M7, X410c M7 |
Disabled, Enabled
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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), 4.0(4), 4.1(1), 4.1(3), 4.2(1), 5.0(1), 5.0(2) |
All M5 servers, C220 M6, C240 M6, B200 M6, X210c M6, C220 M7, C240 M7, X210c M7, X410c M7 |
Disabled, Enabled
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