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*If the feature above is set to Enabled, the following items will become
available for configuration:
Enhanced C-states
Select Enabled to enable Enhanced C1 Power State to boost system
performance. The options are Disabled and Enabled.
C-State Auto Demotion
When this feature is enabled, the CPU will conditionally demote C State
based on un-cored auto-demote information. The options are Disabled,
C1, C3, and C1 and C3.
C-State Un-demotion
When this feature is enabled, the CPU will conditionally undemote from
demoted C3 or C1. The options are Disabled, C1, C3, and C1 and C3.
Package C-State Demotion
This feature enables the Package C-State demotion. The options are
Disabled and Enabled.
Package C-State Un-Demotion
When this feature is enabled, the CPU will conditionally undemote from
demoted Packaged Package C-State Un-Demotion. The options are Dis-
abled and Enabled.
CState Pre-Wake
Use this feature to enable or disable the C-State pre wake. The options
are Disabled and Enabled.
IO MWAIT Redirection
When enabled, this feature will map and send the IO read instructions
to the IO registers. The options are Disabled and Enabled.
Package C State Limit
Select Auto for the AMI BIOS to automatically set the limit on the C-State
package register. The options are Auto, CPU Default, C10, C9, C8, C7S,
C7, C6, C3, C2, and C0/C1.
Package C State Workaround
Enable this feature to fix old HDDs that have problems entering the
Package C State. The options are Disabled and Enabled.
4-13
Chapter 4: AMI BIOS
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