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X8DA3/X8DAi
User’s Manual
Crystal Beach/DCA (Direct Cache Access-available when Crystal Beach/
DMA is enabled.)
This feature works in conjunction with the Intel I/O AT (Acceleration Technology) to
accelerate the performance of the TOE device. When this feature set to Enabled, it
will enhance overall system performance by providing direct cache access for data
transferring. The options are Enabled and
Disabled.
NUMA Support
Select Enabled to use the feature of Non-Uniform Memory Access to improve CPU
performance. The options are
Enabled
and Disabled.
Payload Size
Some add-on cards perform faster when the payload size is limited to 128 Bytes;
while others, with a payload size of 256 Bytes. Please refer to your add-on card
user guide for the desired setting. The options are 256 Bytes and
128 Bytes
.
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 the Intel platforms,
providing the user with greater reliability, security and availability in networking and
data-sharing. The settings are Enabled and
Disabled
.
SouthBridge Confi guration
This feature allows the user to confi gure Intel ICH South Bridge settings.
USB Functions
This feature allows the user to enable or disable onboard USB support. The Options
are: Disabled, and
Enabled
.
Legacy USB Support
Select Enabled to use Legacy USB devices. If this item is set to Auto, Legacy USB
support will be automatically enabled if a legacy USB device is installed on the
motherboard, and vise versa. The settings are Disabled, and
Enabled
.
USB 2.0 Controller Mode
This setting allows you to select the USB 2.0 Controller mode. The options are
Hi-Speed (480 Mbps
) and Full Speed (12 Mbps).
BIOS EHCI Hand-Off
Select Enabled to enable BIOS Enhanced Host Controller Interface support to
provide a workaround solution for an operating system that does not have EHCI
