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Chapter 6: BIOS
Hide Port?
Use this item to hide the root port from the operating system. The options are No and yes.
IOU0 Non-Posted Prefetch/IOU1 Non-Posted Prefetch/IOU2 Non-Posted Prefetch
Select Enable to enble Non-Posted Prefetch support for a PCI-E slot specified by the user.
The options are Disable and Enable.
IOAT Configuration
Enable IOAT
Select Enable to enable Intel I/OAT (I/O Acceleration Technology, which significantly reduces
CPU overhead by leveraging CPU architectural improvements and freeing the system
resource for other tasks. The options are Enable and Disable.
No Snoop
Select Enable to support no-snoop mode for each CB device. The options are Disable
and Enable.
Relaxed Ordering
Select Enable for relaxed ordering support, which will allow certain transactions to be
processed and completed prior to other transactions that have already been queued by
overriding the strict ordering rules of PCI processing. The options are Disable and Enable.
Intel VT for Directed I/O (VT-d)
Intel VT for Directed I/O (VT-d)
Select Enable to use the Intel Virtualization Technology for Direct I/O VT-d support by
reporting the I/O device assignments to the VMM (Virtual Machine Monitor) through the
DMAR ACPI tables. This feature offers fully-protected I/O resource sharing across Intel
platforms, providing greater reliability, security and availability in networking and data-
sharing. The options are Enable and Disable.
ACS Control
This item determines how to use the Access Control Service (ACS) in the system. ACS
control provides an easy way of authenticating and authorizing for the user to gain access
to web applications and services. Select Enable to achieve ACS Control via software
programming. Select Disable to obtain ACS control by managing PCI-E bridge connections.
The options are Enable and Disable.
Interrupt Remapping
Select Enable for Interrupt Remapping support to enhance system performance. The
options are Enable and Disable.
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