The Radeon HD 5970, in theory, should perform a lot faster than the GeForce GTX 660 in general. 78% faster i think. But the problem is that, 5970 only has 1 gig of vram. speed isn't everything.
this is the confusin thing for me :\ it should be better but this 1gb vram .
So im going with 660 , any other openions ?