Here are my initial tests comparing 2x GTX280 to a 5970. Ran them last night with the 280s then today on the same system with no changes. I7 9.20 at 3.8. The GTX280 numbers will be on the left, 5970 on the right. The GTX280 used 190.62 drivers, while the 5970 was on beta 5s.
Crysis - DX10, pretty much maxed with one of the modified configs floating around. 1920x1200, no AA, 16x AF
GPU: 39.22 vs. 36.22 (the 280s dominated here and it's worse than the numbers indicate. Major stuttering on the 5970)
CPU1: 40.26 vs. 45.38
CPU2: 26.78 vs 26.54 (I always use the second loop, but oddly the first loop is always faster on this test. Both cards have a spot where they slow down massively on the second loop, but it was way worse on the 5970, hitting single digit frames for an extended time)
Unigine- DX10, 4xaa, 16xaf, 1920x1200
Tropics: 55.3 vs 71.2 (nice!)
Heaven: 51.1 vs 60.5
Arma 2
allmark: 3954 vs. 4006(there may be a cpu limitation here. when turning off hyperthreading and pushing the i7 to 4.1, I got a near 1:1 boost when playing around with the 280s last night, resulting in 4283)
Initial conclusions: Only the non-game benchmarks showed the kind of performance I would expect of this card. It may not be performing to its full potential in crysis as the air being exhausted wasn't as hot as it should have been, and in fact it beat the 280s in the CPU1 test, which is most similar to gameplay. The card is fairly quiet. Haven't tried to overclock it yet because CCC doesn't have a fan control slider for some reason. My other major knock on it is that switching between my 1920x1200 desktop monitor and my 50inch 1920x1080 plasma is a real pain in the ass. It's like 2 clicks with nvidia and a long drawn out process with ATI's CCC. There's no way I'll keep the card if there's not a better way to do this. Overall it seems like this card is definitely not a "must-have" right now for those who already have a good setup. I would recommend seeing how much new drivers can help this card and what Nvidia has in store. If the Unigine performance were duplicated in games and then 15% added to that through overclocks, it could be a very solid card, but no guarantee of that happening.
Crysis - DX10, pretty much maxed with one of the modified configs floating around. 1920x1200, no AA, 16x AF
GPU: 39.22 vs. 36.22 (the 280s dominated here and it's worse than the numbers indicate. Major stuttering on the 5970)
CPU1: 40.26 vs. 45.38
CPU2: 26.78 vs 26.54 (I always use the second loop, but oddly the first loop is always faster on this test. Both cards have a spot where they slow down massively on the second loop, but it was way worse on the 5970, hitting single digit frames for an extended time)
Unigine- DX10, 4xaa, 16xaf, 1920x1200
Tropics: 55.3 vs 71.2 (nice!)
Heaven: 51.1 vs 60.5
Arma 2
allmark: 3954 vs. 4006(there may be a cpu limitation here. when turning off hyperthreading and pushing the i7 to 4.1, I got a near 1:1 boost when playing around with the 280s last night, resulting in 4283)
Initial conclusions: Only the non-game benchmarks showed the kind of performance I would expect of this card. It may not be performing to its full potential in crysis as the air being exhausted wasn't as hot as it should have been, and in fact it beat the 280s in the CPU1 test, which is most similar to gameplay. The card is fairly quiet. Haven't tried to overclock it yet because CCC doesn't have a fan control slider for some reason. My other major knock on it is that switching between my 1920x1200 desktop monitor and my 50inch 1920x1080 plasma is a real pain in the ass. It's like 2 clicks with nvidia and a long drawn out process with ATI's CCC. There's no way I'll keep the card if there's not a better way to do this. Overall it seems like this card is definitely not a "must-have" right now for those who already have a good setup. I would recommend seeing how much new drivers can help this card and what Nvidia has in store. If the Unigine performance were duplicated in games and then 15% added to that through overclocks, it could be a very solid card, but no guarantee of that happening.