MiTAC TYAN S7012 - Manual (Page 42)

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ACPI C2
ACPI C3 C3 State
Disabled
Nehalem C State action select
Enabled
C6 State
Disabled
Nehalem C State action select
Auto
C1
C3
C6 C State package limit
setting
C7
Selected option will program into C
state package limit register.
Enabled
C1 Auto Demotion
Disabled
When enabled, CPU will
conditionally demote C3/C6/C7
requests to C1 based on uncore
auto-demote information.
Enabled
C3 Auto Demotion
Disabled
When enabled, CPU will
conditionally demote C6/C7
requests to C3 based on uncore
auto-demote information.