Chapter 6: UEFI BIOS
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PCI-E Port Max Payload Size
Selecting Auto for this feature will enable the motherboard to automatically detect
the maximum Transaction Layer Packet (TLP) size for the connected PCI-E device,
allowing for maximum I/O efficiency. Selecting 128B or 256B will designate maximum
packet size of 128 or 256. If possible, select max payload size to 256B. The options
are 128B, 256B, and
Auto.
IOAT Configuration
Disable TPH
Transparent Huge Pages (TPH) is a Linux memory management system that enables
communication in larger blocks (pages). Enabling this feature will increase perfor-
mance. The options are
No
and Yes.
Prioritize TPH
Use this feature to enable Prioritize TPH support. The options are Enable and
Disable.
Relaxed Ordering
Select Enable to enable Relaxed Ordering support, which will allow certain transac-
tions to violate the strict-ordering rules of PCI bus for a transaction to be completed
prior to other transactions that have already been enqueued. 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 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
Select Enable for Access Control Services (ACS) extended capability support to en-
hance system performance. The options are
Enable
and Disable.
Interrupt Remapping
Use this feature to enable Interrupt Remapping support, which detects and controls
external interrupt requests. The options are
Enable
and Disable.
