User Manual

Chapter 5: BIOS Setup
5-64
OS ACPI Cx [ACPI C2]
Allows you to select to report CC3/CC6 to OS ACPI C2 or ACPI C3.
Conguration options: [ACPI C2] [ACPI C3]
Package C State Control
Package C State [Auto]
Allows you to select Package C State limit.
Conguration options: [C0/C1 state] [C2 state] [C6(non Retention state] [Auto]
Register Access Low Latency Mode [Disabled]
Enable low latency mode for register accesses.
Conguration options: [Disabled] [Enabled]
Enabling this mode will prevent PkgC6 as register access fabric is prevented from going to
idle.
CPU Thermal Management
CPU T State Control
Software Controlled T-States [Disabled]
Allows you to enable or disable Software Controlled T-States.
Conguration options: [Disabled] [Enabled]
The following item appears only when
Software Controlled T-States
is set to
[Enabled]
.
T-State Throttle Level [Disable]
On-Die Thermal Throttling.
Conguration options: [Disabled] [6.25%] [12.5%][18.75%][25.0%][31.25%]
[37.5%][43.75%][50.0%][56.25%][62.5%][68.75%][75.0%] [81.25%][87.5%]
[93.75%]
CPU - Advanced PM Tuning
Uncore Freq Scaling [Enable]
If this item is disabled, user can input Uncore Frequency.
Conguration options: [Disable] [Enable]
The following item appears only when
Uncore Freq Scaling
is set to
[Disable]
.
Uncore Freq: [127]
Conguration options: [0] - [127]
Uncore Freq RAPL [Enable]
Conguration options: [Disable] [Enable]
Energy Perf BIAS
Power Performance Tuning [OS Controls EPB]
Conguration options: [OS Controls EPB] [BIOS Controls EPB] [PECI
Controls EPB]