Asus M4N78 - Manual (Page 53)

Chapter 2: BIOS setup 2-15
The Module Version and USB Devices Enabled items show the
auto-detected values. If no USB device is detected, the item shows None.
2.4.6 USB Configuration
The items in this menu allows you to change the USB-related features. Select an item then
press to display the configuration options.
USB Functions [Enabled]
Enables or disables the USB functions. Configuration options: [Enabled] [Disabled]
USB 2.0 Controller [Enabled]
Enables or disables the USB 2.0 Controller. Configuration options: [Enabled] [Disabled]
Legacy USB Support [Auto]
Allows you to enable or disable support for Legacy USB storage devices, including USB flash
drives and USB hard drives. Setting to 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. Configuration options: [Disabled] [Enabled]
[Auto]
USB 2.0 Controller Mode [HiSpeed]
Allows you to configure the USB 2.0 controller in HiSpeed (480 Mbps) or Full Speed (12
Mbps). Configuration options: [FullSpeed] [HiSpeed]