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Chapter 4: AMI BIOS
4-7
C1E Support
Select Enabled to use the feature of Enhanced Halt State. C1E signifi cantly
reduces the CPU's power consumption by reducing the CPU's clock cycle and
voltage during a "Halt State." The options are Disabled and Enabled .
Intel® C-STATE Tech
If enabled, C-State is set by the system automatically to either C2, C3 or C4 state.
The options are Disabled and Enabled.
C-State package limit setting (Available when Intel® C-State Tech is
enabled)
If set to Auto, the AMI BIOS will automatically set the limit on the C-State pack-
age register. The options are Auto , C1, C3, C6 and C7.
C1 Auto Demotion
When enabled, the CPU will conditionally demote C3, C6 or C7 requests to
C1 based on un-core auto-demote information. The options are Disabled and
Enabled.
C3 Auto Demotion
When enabled, the CPU will conditionally demote C6 or C7 requests to C3 based
on un-core auto-demote information. The options are Disabled and Enabled.
DCA Technology
This feature accelerates the performance of TOE devices. Note : A TOE device is
a specialized, dedicated processor that is installed on an add-on card or a network
card to handle some or all packet processing of this add-on card. For this moth-
erboard, the TOE device is built inside the ESB 2 South Bridge chip. This feature
is supported only by some types of processors (i.e., Intel Nehalem-WS 1S). The
options are Enabled and Disabled.
DCA Prefetch Delay
A DCA Prefetch is used with TOE components to prefetch data in order to shorten
execution cycles and maximize data processing effi ciency. Prefetching too fre-
quently can saturate the cache directory and delay necessary cache accesses. This
feature reduces or increases the frequency the system prefetches data. The options
are [8], [16], [32] , [40], [48], [56], [64], [72], [80], [88], [96], [104], [112], [120]

Advanced Chipset Control
The items included in the Advanced Settings submenu are listed below: