I haven't personally heard of your processor not being able to effectively run with that video card. I would be interested in seeing why it couldn't if that's the case, though. Geekapproved- are there any articles out there?
UltimatePC - Have you upgraded to the latest BIOS? How are you connecting the card to your power supply? With a splitter from the four-pin molex? Or by using the 6-pin PCIe power connections directly from the power supply?