IEI Integration NANO-9453 v1.12 - Manual (Page 160)

NANO-9453 EPIC Motherboard
Page 142
No Delay D EFAULT
Delay 1 sec
Delay 2 sec
Delay 4 sec
6.3.9 USB Configuration
Use the USB Configuration menu (BIOS Menu 13) to read USB configuration
information and configure the USB settings.
BIOS Menu 13: USB Configuration
USB Function [6 USB ports]
Use the USB Function BIOS option to enable or disable a specified number of USB ports.
If only two USB ports are being used, disabling the remaining six USB frees up system
resources that can be redirected elsewehere.