User Manual

Chapter 4: AMI BIOS
4-9
CPU HWPM State Control
Enable CPU HWPM
Select Enable for better CPU energy performance. The options are Disable,
HWPM NATIVE MODE, and HWPM OOB MODE.
Enable CPU Autonomous Cstate
Use this feature to enable CPU Autonomous C State, which converts HALT
instructions to Mwait. The options are Disable and Enable.
CPU C State Control
CPU C State
Use this feature to enable the enhanced C State of the CPU. The options are
Disable and Enable.
Package C State Limit
This feature allows the user to set the limit on the C State package register. The
options are C0/C1 State, C2 State, C6 (Non Retention) State, C6 (Rentention)
state, and No Limit.
CPU C3 Report
Select Enabled to allow the BIOS to report the CPU C3 State (ACPI C2) to the
operating system. During the CPU C3 State, the CPU clock generator is turned
off. The options are Enable and Disable.
CPU C6 Report
Select Enabled to allow the BIOS to report the CPU C6 State (ACPI C3) to the
operating system. During the CPU C6 State, the power to all cache is turned
off. The options are Enable and Disable.
Enhanced Halt State (C1E)
Select Enabled to use Enhanced Halt-State technology, which will signicantly
reduce the CPU's power consumption by reducing the CPU's clock cycle and
voltage during a Halt-state. The options are Disable and Enable.
 CPU T State Control
ACPI (Advanced Conguration Power Interface) T-States
Select Enable to support CPU throttling by the operating system to reduce power
consumption. The options are Enable and Disable.