User`s manual

4-10

X8DTT-H+/-HF+/-HEF+/-HIBXF+/-HIBQF+ User’s Manual

DIMM Pitch

This is the physical space between two DIMM modules. Each step is in

1/1000 of an inch. The default is [400]. Press <+> or <-> to change this

value.

North Bridge Conﬁ guration

This feature allows the user to conﬁ gure the settings for the Intel IOH chip.

Intel I/OAT

The Intel I/OAT (I/O Acceleration Technology) signiﬁ cantly reduces CPU over-

head by leveraging CPU architectural improvements, freeing resources for other

tasks. The options are Disabled and Enabled.

DCA Technology

Select Enabled to use Intel's DCA (Direct Cache Access) Technology to enhance

data transfer efﬁ ciency. 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 for the system to prefetch data.

The options are [8], [16], [24], [32], [40], [48], [56], [64], [72], [80], [88], [96],

[104], [112], and [120].

Intel VT-d

Select Enabled to enable Intel's Virtualization Technology support for Direct I/O VT-d

by reporting the I/O device assignments to VMM through the DMAR ACPI Tables.

This feature offers fully-protected I/O resource sharing across Intel platforms, provid-

ing the user with greater reliability, security, and availability in networking and data

sharing. The settings are Enabled and Disabled.

Active State Power-Management

Select Enabled to use the power management for signal transactions between the

PCI Express L0 and L1 Links. Select Enabled to conﬁ gure PCI-Exp. L0 and L1 Link

power states. The options are Disabled and Enabled.

IOH PCIE Max Payload Size

Some add-on cards perform faster with the coalesce feature, which limits the pay-

load size to 128 MB; while others, with a payload size of 256 MB which inhibits

the coalesce feature. Please refer to your add-on card user guide for the desired

setting. The options are 256 MB and 128MB.