Supermicro X9DRW-iF - North Bridge

Chapter 4: AMI BIOS
4-9
ChipsetConguration
North Bridge
This feature allows the user to congure the settings for the Intel North Bridge.
IntegratedIOConguration
Intel VT-d
Select Enabled to enable Intel Virtualization Technology support for Direct I/O
VT-d by reporting the I/O device assignments to the VWM (Virtual Working
Memory) 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 Disabled and
Enabled.
Intel I/OAT
The Intel I/OAT (I/O Acceleration Technology) signicantly reduces CPU over-
head by leveraging CPU architectural improvements, freeing the system resource
for other tasks. The options are Disabled and Enabled.
DCA Support
Select Enabled to use Intel's DCA (Direct Cache Access) Technology to improve
data transfer efciency. The options are Disabled and Enabled.
IIO 1 PCIe Port Bifurcation Control/ IIO 2 PCIe Port Bifurcation Control
This submenu congures the following IO PCIe Port Bifurcation Control settings
for IIO 1 PCIe ports or IIO 2 PCIe ports to determine how the available PCI-
Express lanes are distributed between the PCI-Express Root Ports.
IIO 2 PCIe Port
This item congures IOU2-PCIe Port settings. The options are: x4x4x4x4,
x4x4x8, x8x4x4, x8x8, x16 and Auto.
IIO 3 PCIe Port
This item congures IOU3-PCIe Port settings. The options are: x4x4x4x4,
x4x4x8, x8x4x4, x8x8, x16 and Auto.