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Chapter 6 UEFI BIOS
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II0-PCIE Express Global Options
PCIe Hot Plug
Select Enable to support Hot-plugging for the selected PCI-E slots which will allow the
user to replace the devices installed in the slots without shutting down the system. The
options are
Enable
, Disable, Auto, and Manual.
PCI-E Completion Timeout (Global)
Use this feature to enable PCI-E Completion Timeout support for electric tuning. The
options are Yes,
No
, and Per-Port.
South Bridge
The following South Bridge information is displayed: USB Module Version, USB Devices
Legacy USB Support
Select Enabled to support onboard legacy USB devices. Select Auto to disable legacy
support if there are no legacy USB devices present. Select Disable to have all USB devices
available for EFI applications only. The options are
Enabled,
Disabled and Auto.
XHCI Hand-Off
This is a work-around solution for operating systems that do not support XHCI (Extensible
Host Controller Interface) hand-off. The XHCI ownership change should be claimed by the
XHCI driver. The options are Enabled and
Disabled
.
Port 60/64 Emulation
Select Enabled for I/O port 60h/64h emulation support, which in turn, will provide complete
legacy USB keyboard support for the operating systems that do not support legacy USB
devices. The options are
Enabled
and Disabled.
PCIe PLL SSC
Select Enabled for PCH PCI-E Spread Spectrum Clocking (SSC) support, which will allow
the BIOS to monitor and attempt to reduce the level of Electromagnetic Interference caused
by the components whenever needed. The options are Enabled and
Disabled
.
Port 61h Bit-4 Emulation
Select Enabled for I/O Port 61h-Bit 4 emulation support to enhance system performance.
The options are Enabled and
Disabled
.
Install Windows 7 USB Support
Select Enabled to install Windows 7 and the XHCI drivers for USB keyboard/mouse
support. After you've installed the Windows 7 and XHCI drivers, be sure to set this feature
to "Disabled" (default). The options are
Disabled
and Enabled.