[stansdds]

You definitely need older drivers that are known to be SLI stable for that card or go back to using the 8600GT. As JG14_Jagr pointed out, those dual GPU cards get hot, so keeping it cool is very important. Personally, I don't like dual GPU or SLI systems, I think one really fast GPU uses less power, generates less heat, and is easier to run than any multiple GPU setup.