If you look at my home grown results, you'll see in Batman Arkham Asylum and Stalker CoP that dual SLI doesn't scale as well as tri SLI; These are only two games however. Definitely! A single GTX580 can apparently overclock like a mofo - I'm not having such luck with a multi GPU set up. I fully agree with wuyanxu; at 2560x1600 and above, GPU power becomes the limiting factor in most modern games. Your overclocked CPU should be absolutely fine.