I just installed a BFG 6800Gt OC w/256mb. I can't tell you offhand what my numbers are, but playing games like HL2, Riddick, Farcry and COD:UO have been phenomenal. The only game with an issue so far is BF2. I get a little stutter in the beginning and sporadic chop. I'm working on that issue. When I get a chance I'm going to run fraps and see how it's making out.
How's this card on Doom3?...just curious.