i've got both cards clocked at 600/2000 with a 2.8Ghz @ 1.55v on my Opteron 175.
4 drives, one dvd drive and lots of fans. Another thing to note is that one 8800GTX uses 2 pci-e molex's. So you'd need 4 pci-e molex's to run 2 8800GTX's
Conroe is coming, but in the a few months. I don't play much games except for fear, oblivion, wow, company of heroes, and madden 07.
Well I don't play them all the time but I got those installed atm.
Gears of War on Live is taking up most of my time.
Gamertag is Roliath