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Chapter 4: AMI BIOS
TM2 Mode (Available when supported by the CPU.)
Use this feature to select the throttling mode for TM2. The options are LFM Throt-
tling and Adaptive Throttling.
CPU C State
C-States architecture, a processor power management platform developed by
Intel, can further reduce power consumption from the basic C1 (Halt State) state
that blocks clock cycles to the CPU. Select Enabled for CPU C-Sates support. The
options are Disable, Enable, and Auto.
If CPU C State is set to Enable or Auto, the following three items will be avail-
able for configuration:
Enhanced Halt State (C1E) (Available when "CPU C-States" is set to
Enabled)
Select Enabled to support Enhanced C1 Power State to boost system performance.
Please reboot the system for the new setting to take effect. The options are Dis-
able and Enable.
ACPI C2 (Available when "CPU C-States" is set to Enabled)
Select Enabled for ACPI C2 support to determine how the processor will report the
CPU-C state to the operating system. The options are Disable, C6 NS, and C6 FS.
Monitor/Mwait
Select Enabled to implement the Mwait instruction along with the Monitor instruc-
tion to allow the processor to specify the location for the BIOS to monitor activities
and to issue the instruction to put the operation on hold (Mwait). The options are
Disable and Enable.
L1 Prefetcher (Available when supported by the CPU)
If enabled, the hardware prefetcher will prefetch streams of data and instructions
from the main memory to the L1 cache to improve CPU performance. The options
are Enable and Disable.
L2 Prefetcher (Available when supported by the CPU)
If enabled, the hardware prefetcher will prefetch streams of data and instructions
from the main memory to the L2 cache to improve CPU performance. The options
are Enable and Disable.
ACPI 3.0 T-States (Available when "CPU C-States" is set to Enabled)
Select Enabled to support ACPI (Advanced Configuration and Power Interface) 3.0
T-States to determine how the processor will report to the operating system during
CPU-Throttling states. The options are Disable and Enable.
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