Supermicro X9DA7 - Chipset Configuration; North Bridge and IOH Configuration

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X9DA7/X9DAE Motherboard User's Manual
Chipset Conguration
North Bridge
This feature allows the user to congure the settings for the Intel North Bridge.
IOH 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 Enabled and
Disabled.
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 Enabled and Disabled.
IOH 0 / IOH 1 PCIe Port Bifurcation Control
This allows the user to congure the following IO PCIe Port Bifurcation Control
settings for IOH 1 PCIe port and IOH 2 PCIe port, which determine how to dis-
tribute the available PCI-Express lanes to the PCI-Exp. Root Ports.
IOU1-PCIe Port
This feature allows the user to set the PCI-Exp bus speed between IOU1 and
PCIe port. The options are x4x4 and x8. The default setting for IOH 0 is x4x4.
The default setting for IOH 1 is x8.
Port 1A Link Speed
Select GEN1 to enable PCI-Exp Generation 1 support for Port 1A. Select GEN2
to enable PCI-Exp Generation 2 support for Port 1A. Select GEN3 to enable
PCI-Exp Generation 3 support for Port 1A. The options are GEN1, GEN2, and
GEN3.