Usb Configuration - Asus SABERTOOTH Z77 User Manual

3.5.5

USB Configuration

The items in this menu allow you to change the USB-related features.
UEFI BIOS Utility - Advanced Mode
Main Ai Tweaker
Back Advanced\ USB Configuration >
USB Configuration
USB Devices:
1 Keyboard, 1 Mouse, 2 Hubs
Legacy USB Support
Legacy USB3.0 Support
Intel xHCI Mode
EHCI Hand-off
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).
Intel xHCI Mode [Smart Auto]
[Smart Auto] Keeps the last operation of xHCI controller in OS during boot up.
[Auto] Enables the auto default.
[Enabled] Enables the operation of xHCI controller.
[Disabled] Disables the function.
EHCI Hand-off [Disabled]
[Disabled] Disables the function.
[Enabled] Enables the support for operating systems without an EHCI hand-off
feature.
ASUS SABERTOOTH Z77
Advanced Monitor
Enabled
Enabled
Smart Auto
Disabled
Exit
Boot Tool
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.
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