IEI Integration NANO-9453 v1.0 - Manual (Page 153)

NANO-9453 EPIC Motherboard
Page 135
HiSpeed D EFAULT The controller is capable of operating at 480Mb/s
BIOS EHCI Handoff [Enabled]
Use the BIOS EHCI Handoff option for systems running OSes that do not have EHCI
hand-off support. The EHCI ownership change is managed by the EHCI driver.
Disabled Systems with OSes that do not support EHCI can
use the EHCI handoff functionality.
Enabled D EFAULT Systems with OSes that do not support EHCI cannot
use the EHCI handoff functionality.
6.3.9.1 USB Mass Storage Device Configuration
Use the USB Mass Storage Device Configuration menu (BIOS Menu 14) to configure
USB mass storage class devices.
BIOS Menu 14: USB Mass Storage Device Configuration