Chapter 4: BIOS
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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 Conguration
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.
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