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X9DAi Motherboard User's Manual
OLTT (Open Loop Thermal Throttling) Peak BW (Bandwidth) %
This item sets a percentage of the peak bandwidth allowed for Open Loop
Thermal Throttling. The range is between 25% and 100%. The default settling
is
50
(%).
South Bridge Configuration
This feature allows the user to configure the settings for the Intel PCH chip.
PCH Information
This feature displays the following PCH information.
Name
: This item displays the name of the PCH chip.
Stepping
: This item displays the status of the PCH stepping.
USB Devices
: This item displays the USB devices detected by the BIOS.
All USB Devices
This feature enables all USB ports/devices. The options are Disabled and
Enabled
.
(If set to Enabled, EHCI Controller 1 and Controller 2 will appear.)
EHCI Controller 1/EHCI Controller 2 (Available when All USB Devices is set
to Enabled)
Select Enabled to enable Enhanced Host Controller Interface (EHCI) Controller 1/
Controller 2. The options are Disabled and
Enabled
.
Legacy USB Support (Available when USB Functions is not Disabled)
Select Enabled to support legacy USB devices. Select Auto to disable legacy sup-
port if USB devices are not present. Select Disable to have USB devices available
for EFI (Extensive Firmware Interface) applications only. The settings are Disabled,
Enabled
and Auto.
Port 60/64 Emulation
Select Enabled to enable I/O port 60h/64h emulation support for the legacy USB
keyboard so that it can be fully supported by the operating systems that does not
recognize a USB device. The options are Disabled and
Enabled
.
EHCI Hand-Off
This item is for operating systems that do not support Enhanced Host Controller
Interface (EHCI) hand-off. When enabled, EHCI ownership change will be claimed
by the EHCI driver. The options are
Disabled
and Enabled.
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