Computer Hardware User Manual

4-8

X8STi/X8STi-F/X8STi-3F/X8STi-LN4 User’s Manual

C1E Support

Select Enabled to use the "Enhanced Halt State" feature. 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.

C-STATE Tech

If enabled, C-State is set by the system automatically to either C2, C3 or C4 state. The op-

tions are Disabled and Enabled.

C-State package limit setting

If set to Auto, the AMI BIOS will automatically set the limit on the C-State package 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 special-

ized, 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 motherboard, 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 frequently 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]

XAdvanced Chipset Control

The items included in the Advanced Settings submenu are listed below.

XQPI and IMC Conﬁ guration

QuickPath Interconnect (QPI) is the connection between the CPU and the motherboard's

I/O hub. Use this feature to modify speed and power management settings.

QPI Links Speed

Use this feature to select QPI data transfer speed. The options are Slow-mode,

and Full Speed.