Asus T4-P5G31A - Manual (Page 78)

5-26 Chapter 5: BIOS setup
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: [Full Speed] [HiSpeed]
BIOS EHCI Hand-Off [Enabled]
Allows you to configure the BIOS EHCI Hand-Off.
Configuration options: [Disabled] [Enabled]