I just finished a playthrough of last light to test out my new 680SLI setup. One thing that I noticed was SSAA SLAUGHTERS framerate in that game more than any other game i've played. I turned it off completely along with motion blur and physx (just because I don't like motion blur and physx is pointless imo) and left everything else on ultra and it was cruising along at a consistent 60-90 fps with no real noticeable drops. Also interesting was that even with anti aliasing off, I didn't notice any jaggies really, which surprised me. It's a solid engine. 4670k + 680SLI