I was into overclocking for a while, raised my 4200 from 2.2 to 2.6, only noticed a slight change in 3dmark score, and was thinking of buying watercooling for a while. But, for the price of watercooling that ill get, i could buy a 2nd 7900gt and have sli, which will give me more fps, which is what im searching for. What should i do?