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X9DAi Motherboard User's Manual
Intel
®
I/OAT
The Intel I/OAT (I/O Acceleration Technology) significantly 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 efficiency. The options are
Enabled
and Disabled.
IOH 1 / IOH 2 PCIe Port Bifurcation Control
This allows the user to configure 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 1 is
x4x4
.
The default setting for IOH 2 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.
Port 1B Link Speed
Select GEN1 to enable PCI-Exp Generation 1 support for Port 1B. Select GEN2
to enable PCI-Exp Generation 2 support for Port 1B. Select GEN3 to enable
PCI-Exp Generation 3 support for Port 1B. The options are GEN1,
GEN2
, and
GEN3.
IOU2-PCIe Port
If this feature allows the user to set the bus speed between the IOU2 and the
PCI-Exp port. The options are x4x4x4x4, x4x4x8, x8x4x4, x8x8,
and
x16
.
Port 2A Link Speed
Select GEN1 to enable PCI-Exp Generation 1 support for Port 2A. Select GEN2
to enable PCI-Exp Generation 2 support for Port 2A. Select GEN3 to enable
PCI-Exp Generation 3 support for Port 2A. The options are GEN1,
GEN2
, and
GEN3.
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