Chapter 4: AMI BIOS
4-9
CPU C State Control (Available when Power Technology
is set to Custom)
C2C3TT (C2-to-C3 Transaction Timer)
This item is used to set the transaction timer from the C2 state to the C3 state.
Enter 0 for Auto, which will allow the BIOS to congure the transaction timer
automatically. The default setting is 0 (Auto).
Package C State limit
Use this item to set the limit on the C-State package register. The options are
C0/1 state, C2 state, C6 (non-Retention) state, and C6 (Retention) state.
CPU C3 Report
Select Enable 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 Disable and Enable.
CPU C6 Report (Available when Power Technology is set to Custom)
Select Enable to allow the BIOS to report the CPU C6 state (ACPI C3) to the
operating system. During the CPU C6 state, power to all cache is turned off.
The options are Disable and Enable.
Enhanced Halt State (C1E)
Select Enable to use the "Enhanced Halt State" feature, which will signicantly
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 (Available when Power Technology
is set to Custom)
ACPI (Advanced Conguration Power Interface) T-States
Select Enable to support CPU throttling by the operating system to reduce power
consumption. The options are Disable and Enable.
CPU Advanced PM (Power Management) Tuning
Energy Perf (Performance) BIAS
Energy Performance Tuning
Select BIOS to allow the system BIOS to congure the 'Energy-Performance
Tuning Bias' setting below. The options are BIOS and OS.
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