IEI Integration KINO-PVN-D4251_D5251 - Manual (Page 96)

KINO-PVN-D5251/D4251/ Mini ITX SBC
Page 82
 USB Function [Enabled]
Use the USB Function BIOS option to enable or disable USB function support.

Disabled USB function support disabled

Enabled D EFAULT USB function support enabled
 USB 2.0 (EHCI) Support [Enabled]
Use the USB 2.0 (EHCI) Support BIOS option to enable or disable USB 2.0 support.

Enabled D EFAULT USB 2.0 (EHCI) support enabled

Disabled USB 2.0 (EHCI) support disabled
 Set Spread Spectrum Function [Disabled]
The Set Spread Spectrum Function option can help to improve CPU EMI issues.

Disabled D EFAULT The spread spectrum mode is disabled

Enabled The spread spectrum mode is enabled