Hey, i'm new here and I just have a quick question. I recently built my first ever gaming pc and everything is great. The graphics card I use is the 560ti and I was wondering how SLI works. Is it as simple as if you put in 2 560ti's it doubles power or is it like a 25% increase or does it depend?
It will depend entirely on the game. Some games will have no increase (with some even loosing performance). Other games will run at near 100% increases. On average I'd say it's around a 65% increase. For the games that don't support sli/crossfire you can disable the 2nd (or 3rd) GPU in the nVidia control panel. You might also notice some micro stuttering as the two GPUs sync up their outputs, but I never noticed it on myself when I was using a pair of 460s.