the gtx660 does not perform better. they are about on par, with the 660 better at some games, and the 7870 better at others. look at benchmarks of the games you plan to play and see which card is faster for those games. you also get physx with the 660. adaptive vsync is crap. twin frozr 4 or 3 doesnt matter both perform well enough on the respective cards. the power consumption of the 660 is also slightly lower.