[smoore]

The extra NIC won't harm anything.

RE: making the onboard one work:

- when you enable it in the BIOS does Windows try to find a driver?

if so, go get the driver from the motherboard manufacturer. It's always a good idea to get the latest driver package from them at the same time as the BIOS update. I keep them together in a folder with the date.

RE: startup problem:

need to know what happened just before this problem started... hardware changes, software changes, etc.

double check the BIOS settings.

ensure the BIOS is talking about CPU overclocking and it's not the Video Card's BIOS telling you "Overclocking failed"

if the NIC is just dead it's not a tradegy but the boot sequence failure is pretty worrysome.