Originally Posted by WeReWoLf
If he were gaming on a 30", then yes SLI would make more of a difference, but if he were using a 30" most likely he would have mentioned it.
Most of the time, my CPU is being overworked, and the graphics card is only doing between 10 and 40% processing. I can fully stress the GPU if I game with 32xAA and 8x Transparency for some games like MW2.
That just doesn't sound right at all unless you are running an extremely low resolution. There is no way a single 480 is only using 10-40% of it's power. I routinely see my 480's go into the 90's in SLI with the same speed processor at 1920x1080.
Do you just play old or less demanding games?
Anyway, the bottom line is that a q9550 + 2 480's will be a hell of a lot faster than an i7 and 1 480. Sure the i7 is a better cpu, but it's not nearly as big a jump as a second 480 would be.
Edit: If your CPU bottlenecks your 480, why do you have your 480 overclocked? Overclocking a video card that bottlenecked by the CPU will give zero performance benefit, so you might as well leave it at stock.