So I got my XFX 4890 in yesterday and put it through its paces. This card is a beast! Compared to my previous card, a 8800GT SC, anyway.
Using Rivatuner and Furmark, I was able to take it to 932mhz core, 1050mhz memory and have it be stable for a few hours with no visible artifacts. 950mhz on the core caused a near instant crash :lol Anyway, I backed it back down to 900/1000 and left it there. Was seeing ~70-75 C on the core at 932mhz, it hovers in the high 60's at 900.
(all benchmarks are at 1920x1200 res)
Crysis Warhead @ full Enthusiast, no AA, I was getting 25-35 fps.
Fallout 3, everything maxed, 8xAA, smooth as silk (~60fps)
Farcry 2, smooth with everything maxed. I need to look up how to show fps in that.
In the end I'm totally satisfied with my upgrade. The only complaint I could levy against it would be the fan noise, which really isn't that bad even when I OC'd it.
System specs:
Q6600 @ 3.2ghz on air, G.Skill 4GB 1066mhz, Corsair 620w PSU, Coolermaster 690 case, Thermaltake Ultima-90 HS with Scythe fan, plus other Scythe fans in the case. 2x750GB WD Black 7200rpm drives.