Compared to my previous card, the performance difference is quite OK.
In BF3 there’s a huge improvement of my FPS to around 12-20 fps additional. I was not surprised since NVidia is optimized on BF3.
My previous card, a Sapphire (single fan) 7950 scored P9119 on 3dmark11. In the EVGA GTX 680 its P10580, both overclocked. But the 680 is cooler and produces less noise.