Usb Configuration - ASROCK Z790 Series Setup Manual

Intel Z790/H770/B760 Series

3.4.7 USB Configuration

Legacy USB Support
Allows you to enable or disable Legacy OS Support for USB devices. This item appears only
for the motherboard that supports the PS/2 port.
[Auto] disables legacy support if no USB devices are connected.
[Disabled] keeps USB devices available only for EFI applications.
[UEFI Setup Only] sets to support USB devices under the UEFI setup and Windows/Linux
operating systems only.
XHCI Hand-off
This is a workaround for OSes without XHCI hand-off support. The XHCI ownership
change should be claimed by XHCI driver.
Configuration options: [Enabled] [Disabled]
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