Supermicro X13DDW-A User Manual page 105

P-state switching to occur based on the real-time energy needs of applications so that
the power-to-performance balance can be optimized for energy efficiency. The options
are HW_ALL and SW_ALL.
Turbo Mode (Available when "SpeedStep (P-States)" is set to Enable)
Select Enable to allow the CPU to operate at the manufacturer-defined turbo speed by
increasing CPU clock frequency. This feature is available when it is supported by the
processors used in the system. The options are Disable and Enable.
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 Auto to allow the BIOS to automatically demote the CPU to C1 State. The op-
tions are Disable, Enable, and Auto. (Please be sure to save your setting and reboot the
system for the change you've made to take effect.)
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Chapter 4: UEFI BIOS