Chapter 4: UEFI BIOS
107
Hardware PM State Control
Hardware P-States
If this feature is set to Disable, system hardware will choose a P-state setting for the
system based on an OS request. If this feature is set to Native Mode, hardware will
choose a P-state setting based on the OS guidance. If this feature is set to Native Mode
with No Legacy Support, system hardware will choose a P-state setting independently
without OS guidance. The options are Disable, Native Mode, Out of Band Mode, and
Native Mode with No Legacy Support.
Frequency Prioritization (Available when the previous item - "Hardware
P-States" is set to "Native Mode with Legacy Support" or using the
Native Mode with No Legacy support)
SST-CP
With Intel Speed Select Technology (Intel SST-CP), surplus frequency is allocated based
on the cores' weights. The weight for each core is assigned by the OS or the Virtual
Machine Manager (VMM). The options are Enable and Disable.
CPU C State Control
Enable Monitor MWAIT
Select Enable to support Monitor and Mwait, which are two instructions in Streaming
SIMD Extension 3 (SSE3), to improve synchronization between multiple threads for CPU
performance enhancement. The options are Disable, Enable, and Auto.
CPU C1 Auto Demotion
Select Enable to allow the CPU to automatically demote to C1 State. Please reboot the
Auto.
CPU C6 Report
Select Enable to allow the BIOS to report the CPU C6 State (ACPI C3) to the operating
Disable, Enable, and Auto.
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