Just upgraded from 6950 2GB x 2 to GTX580 3GB x 2 for greater good. Tried 275.27 beta, 275.33 whql, and 275.36 inf mod, but still have the following problems: Total War Shogun 2: slightly worse performance than 6950 2GB x 2 in the benchmark. This is np, as long as it's not much slower. The bigger problem is that I get very serious lag spikes when I try to scroll the campaign map. Fraps/MSI AB reports 40+ fps when I don't scroll the campaign map, but single-digit-fps when I scroll. Selecting troops/cities takes ages to respond. Am I the only one to suffer from this problem? I understand it's an AMD's game, but Dragon Age 2 didn't take so long for a driver fix? I have to use DX9 mode to avoid such problems for now. The Witcher 2: it's the steam version with the latest patches as of today. As long as I don't use nv inspector, the GPU usage on both cards are rather low (around 60% each), and I get much worse fps than 6950 2GB x 2. What just happened to nVidia? It's an nVidia's game which is supposed to work like HAWX 2 and Crysis 2. Why let AMD to offer official CrossfireX support first? The only gain I have received is just Metro 2033, for which the playing experience has become more smooth, but it's not surprising for an nVidia's game. Oh and I forgot to mention that the PhysX in Mafia 2 sux. As long as I do not disable SLI and specify card 2 for dedicated PhysX, the fps is rather low, forcing me to turn off PhysX. Can't say it's a nice experience. Now I think the best usage of these GTX580s are for CUDA programming until 28nm soon.