Chapter 7: BIOS
7-9
Data Direct I/O
Select Enabled to enable Intel I/OAT (I/O Acceleration Technology), which
signi
fi
cantly reduces CPU overhead by leveraging CPU architectural
improvements and freeing the system resource for other tasks. The options
are Disabled and
Enabled
.
DCA Support
When set to Enabled, this feature uses Intel's DCA (Direct Cache Access)
Technology to improve data transfer ef
fi
ciency. The default is
Enabled
and
can not be changed.
PCIe Port Bifurcation Control
This submenu con
fi
gures the following IO PCIe Port Bifurcation Control
settings for the PCIe ports to determine how the available PCI-Express
lanes will be distributed between the PCI-Exp. Root Ports.
CPU 4 PCIe Slot 1 Link Width
This feature allows the user to set the PCI-Exp bus speed between CPU
4 and the PCI-e port. The options are x4, and
x8
.
CPU 4 PCIe Slot 1 Link Speed
Select GEN1 to enable PCI-Exp Generation 1 support for Slot 1. Select
GEN2 to enable PCI-Exp Generation 2 support for Slot 1. Select GEN3 to
enable PCI-Exp Generation 3 support for Slot 1. The options are GEN1,
GEN2
,
and
GEN3
.
CPU 4 PCIe Slot 2 Link Width
This feature allows the user to set the PCI-Exp bus speed between CPU
4 and the PCI-e port. The options are x4, x8, and
x16
.
CPU 4 PCIe Slot 2 Link Speed
Select GEN1 to enable PCI-Exp Generation 1 support for Slot 2. Select
GEN2 to enable PCI-Exp Generation 2 support for Slot 2. Select GEN3 to
enable PCI-Exp Generation 3 support for Slot 2. The options are GEN1,
GEN2
,
and
GEN3
.
CPU 1 PCIe Slot 3 Link Width
This feature allows the user to set the PCI-Exp bus speed between CPU
1 and the PCI-e port. The options are x4, and
x8
.
