IEI Integration NANO-9452 v4.02 - Manual (Page 142)

NANO-9452 EPIC Motherboard
Page 124
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Enabled D EFAULT Systems with OSes that do not support EHCI cannot
use the EHCI handoff functionality.
6.4 PCI/PnP
Use the PCI/PnP menu (BIOS Menu 13) to configure advanced PCI and PnP settings.
WARNING:
Setting wrong values for the BIOS selections in the PCIPnP BIOS
menu may cause the system to malfunction.