Asus ProZ790-CREATOR WIFI LGA 1700 ATX Motherboard - Manual (Page 66)

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SR-IOV Support
This option enables or disables Single Root IO Virtualization Support if the system has SR-
IOV capable PCIe devices.
Configuration options: [Disabled] [Enabled]
The Mass Storage Devices item shows the auto-detected values. If no USB device is
detected, the item shows None .
Legacy USB Support
[Enabled] Your system supports the USB devices in legacy operating systems.
[Disabled] Your USB devices can be used for BIOS setup only and cannot be
recognized in the boot devices list.
[Auto] Your system automatically detects the presence of USB devices at startup.
If any USB devices are detected, the legacy USB support is enabled.
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.
Mass Storage Devices:
Allows you to select the mass storage device emulation type for devices connected. [Auto]
enumerates devices according to their media format. Optical drives are emulated as [CD-
ROM] , drives with no media will be emulated according to a drive type.
Configuration options: [Auto] [Floppy] [Forced FDD] [Hard Disk] [CD-ROM]
6.10 USB Configuration
The items in this menu allow you to change the USB-related features.