User Manual

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Chapter 4: BIOS Setup
4.6.12 USB Configuration
The items in this menu allow you to change the USB-related features.
The
Mass Storage Devices
item shows the auto-detected values. If no USB device is
detected, the item shows
None
.
Legacy USB Support
[Enabled] Enabled the Legacy USB support.
[Disabled] USB devices are available only for EFI applications.
[Auto] Automatically disabled the Legacy USB support if no USB devices are
connected.
XHCI Hand-off
This is a workaround for OSes without XHCI hand-off support. The XHCI ownership change
should be claimed by XHCI driver.
[Disabled] Support XHCI by XHCI drivers for operating systems with XHCI support.
[Enabled] Support XHCI by BIOS for operating systems without XHCI support.
The following item appears only when
Above 4G Decoding
is set to
[Enabled]
.
Re-Size BAR Support
If system has Resizable BAR capable PCIe Devices, this option enables or disables
Resizable BAR Support.
Configuration options: [Disabled] [Enabled]
SR-IOV Support
Allows you to enable or disable Single Root IO Virtualization Support if the system has SR-
IOV capable PCIe devices.
Configuration options: [Disabled] [Enabled]