When SLI is activated, most games show artifacts and/or begin to lag after a while. Without SLI everything's fine. Also, if I leave the fans on auto control they quickly go up to around 70-80%, which is incredibly loud. If I set the fans to 40%, idle temperatures are at around 60 degrees, which I guess is a bit high. Under load, with the fan set to 55-60%, the temperatures go up to around 80 degrees. That is a bit high, I guess, but it's not enough to cause problems, right?
I've tried switching the graphics cards place but it had no effect.
Also, in 3DMark06 I get 15400, should I get more than that?
I have 2 XFX9800GTX+, Asus P5N-T Deluxe and an e6750 overclocked to 3.2GHz.
Edit: PSU is Corsair 750W.