Rebuilt computer not recognizing PCI-E video card

Hi all, just been reading this and I am having the exact same problem. One minute it was working fine, restarted the PC and it wasn't. Tried everything! The card seems to be working fine its just not outputting anything and I can't stop the PC booting to the onboard graphics (even though PCI Express is selected in the BIOS). Is there a way to disable the onboard graphics other than uninstalling the drivers? I'm worried that if there is, and the card doesn't work, I'll be stuck without any and never be able to see it again!
 
@ adsheff - I suggest you start a fresh thread detailing exactly what happened. Have you tested your card on another working system to determine that it's functioning OK?
 
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