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
.
