Usb Configuration - Asus MAXIMUS VII IMPACT User Manual

3.6.5

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]
[Enabled]
[Auto]
Intel xHCI Mode [Smart Auto]
[Smart Auto]
[Auto]
[Enabled]
[Disabled]
EHCI Hand-off [Disabled]
This item is set to [Disabled] by default for the EHCI (enhanced host controller interface)
support by EHCI drivers in operating systems.
[Enabled]
[Disabled]
3-46
The USB devices can be used only for the BIOS setup program. It cannot
be recognized in boot devices list.
Enables the support for USB devices on legacy operating systems (OS).
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.
Once the xHCI driver has been detected, the USB 3.0 mode will be
supported during both POST and operating system.
xHCI controller will be enabled and run at USB 3.0 mode when the xHCI
driver is installed in the operating system.
Enables the xHCI controller.
Disables the xHCI controller.
Enables the support for operating systems without an EHCI hand-off
feature.
Disables the EHCI Hand-off support.
Chapter 3: BIOS setup