Contec SEH-9450-LAS - Manual (Page 71)

8. BIOS Setup
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SEH-9450-LAS
Description Choice
USB 2.0 Controller
You can disable this function if you are not using onboard
USB 2.0 feature.
USB Keyboard Support
Select Enabled if your system contains a Universal Serial
Bus (USB) controller and you have a USB keyboard.
AC97 Audio
Select Enabled to use the audio capabilities of your system.
Most of the following fields do not appear when this field is
Disabled.
Onboard LAN
Select Enabled to active the onboard 10/100/1000 LAN
controller, select Disabled to turn-off the onboard
10/100/1000 LAN controller when you do not want to use
this function.