Resident Evil 6 Benchmark Tool Stock Run
The GTX 660 is a very big jump in performance compared to its midget siblings as well as its Fermi Counter parts. This is practically a gem of a card in the mid-level department.
FPS Hungry Games Battlefield 3 in Multiplayer mode is giving off 42 to 60fps while Vsync is Turned On in Ultra Settings and letting itself loose when Vsync is Off at 44 to 66fps. Far Cry 3 at 37 to 55FPS is playable at Ultra Settings and when you turn off Vsync the FPS is stable at 42 to 64fps.
The PhysX test for Batman Arkham City was even better at it was maintaining 25 to 50fps without much dip. That was clearly a good improvement from the 650ti and 650 as well as letting you play the Monster Metro 2033 at 24 to 48fps when Vsync is turned on and 26 to 47fps when turned off at Ultra Settings DX11 mode.
Even the upcoming Resident Evil 6 ranks the GTX 660 an S with a score of 7372 in Stock mode and lets you play the game in very High Resolutions.