IEI Integration NANO-9452 v4.02 - Manual (Page 140)

NANO-9452 EPIC Motherboard
Page 122
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 elsewhere.

Disabled USB function support disabled

2 USB Ports Two USB ports are enabled

4 USB Ports Four USB ports are enabled

6 USB Ports D EFAULT Six USB ports are enabled