User Manual

5-14
Chapter 5: BIOS Setup
Race To Halt (RTH) [Enabled]
Allows you to enable or disable Race To Halt feature. RTH will dynamically increase CPU
frequencyinordertoenterpkgC-Statefastertoreduceoverallpower.RTHiscontrolled
through MSR 1FC bit 20.
Congurationoptions:[Disabled][Enabled]
Intel(R) Speed Shift Technology [Disabled]
Allows you to enable or disable Intel(R) Speed Shift Technology support. Enabling will expose
the CPPC v2 interface to allow for hardware controlled P-states.
Congurationoptions:[Disabled][Enabled]
HDC Control [Enabled]
[Disabled] DisableHDC.
[Enabled] CanbeenablebyOSifOSnativesupportavailable.
Turbo Mode [Enabled]
Allows you to enable or disable processor turbo mode if EMTTM is also enabled.
Congurationoptions:[Disabled][Enabled]
C-States [Enabled]
AllowsyoutoenableordisableCPUpowermanagement,thisallowstheCPUtoenterC-state
when it is not 100% utilized.
Congurationoptions:[Disabled][Enabled]
The following items appears only when you set C-States to [Enabled].
Enhanced C-States [Enabled]
Allows you to enable or disable C11E. Enable this item to allow the CPU to switch to
minimum speed when all cores enter C-State.
Congurationoptions:[Disabled][Enabled]
C-State Auto Demotion [C1 and C3]
ThisitemallowsyoutoconguretheC-stateautodemotion.
Congurationoptions:[Disabled][C1][C3][C1andC3]
C-State Un-demotion [C1 and C3]
ThisitemallowsyoutoconguretheC-stateUn-demotion.
Congurationoptions:[Disabled][C1][C3][C1andC3]
Package C-State Demotion [Disabled]
ThisitemallowsyoutocongurethePackageC-StateDemotion.
Congurationoptions:[Disabled][Enabled]
Package C-State Un-demotion [Disabled]
ThisitemallowsyoutocongurethePackageC-stateUn-demotion.
Congurationoptions:[Disabled][Enabled]
Package C-state Limit [Auto]
ThisitemallowsyoutoselectthemaximumpackageC-statelimitsetting.
Congurationoptions:[C0/C1][C2][C3][C6][C7][C7S][C8][C9][C10][CPUDefault]
[Auto]