Asus P9X79 DELUXE - Manual (Page 106)

3-32 Chapter 3: BIOS setup
Chapter 3
3.5.5 USB Configuration
The items in this menu allow you to change the USB-related features.
The USB Devices item shows the auto-detected values. If no USB device is detected, the
item shows None.
Legacy USB Support [Enabled]
[Disabled] The USB devices can be used only for the BIOS setup program.
[Enabled] Enables the support for USB devices on legacy operating systems (OS).
[Auto] Allows the system to detect the presence of USB devices at startup. If
detected, the USB controller legacy mode is enabled. If no USB device is
detected, the legacy USB support is disabled.
Legacy USB3.0 Support [Enabled]
[Disabled] Disables the function.
[Enabled] Enables the support for USB 3.0 devices on legacy operating systems
(OS).
EHCI Hand-off [Disabled]
[Disabled] Disables the function.
[Enabled] Enables the support for operating systems without an EHCI hand-off
feature.
Main Ai Tweaker Advanced Monitor Boot Tool
Exit
Enables Legacy USB support. AUTO
option disables legacy support if no
USB devices are connected. DISABLE
option will keep USB devices
available only for UEFI applications.
Back Advanced\ USB Configuration >
UEFI BIOS Utility - Advanced Mode
USB Configuration
USB Devices:
1 Keyboard, 1 Mouse, 4 Hubs
Legacy USB Support Enabled
Legacy USB3.0 Support Enabled
EHCI Hand-off Disabled