Chapter 4: BIOS
4-15
CPU C-States
Use this feature to enable the C-State of the CPU. The options are
Disabled and
Enabled
.
Enhanced C-States
Use this feature to enable the enhanced C-State of the CPU. The options
are Disabled and
Enabled
.
C-State Auto Demotion
Use this feature to prevent unnecessary excursions into the C-states
to improve latency. The options are Disabled, C1, C3, and
C1 and C3
.
C-State Un-Demotion
This feature allows the user to enable or disable the un-demotion of
C-State. The options are Disabled, C1, C3, and
C1 and C3
Package C-State Demotion
Use this feature to enable or disable the Package C-State demotion. The
options are
Disabled
and Enabled.
Package C-State Un-Demotion
Use this feature to enable or disable the Package C-State un-demotion.
The options are
Disabled
and Enabled.
C-State Pre-Wake
This feature allows the user to enable or disable the C-State Pre-Wake.
The options are Disabled and
Enabled
.
Package C-State Limit
Use this feature to set the Package C-State limit. The options are C0/
C1, C2, C3, C6, C7, C7s, C8, and
AUTO
.
CPU Thermal Configuration
CPU DTS
Select Enabled for the ACPI thermal management to use the DTS SMM
mechanism to obtain CPU temperature values. Select Disabled for EC
to report the CPU temperature values. The options are
Disabled
and
Enabled.
ACPI 3.0 T-States
Select Enabled to support CPU throttling by the operating system to
reduce power consumption. The options are
Disabled
and Enabled.
