Currently, I have a single 8800gt and I recently bought a 24" monitor. I used to play on a 19", so now, I am getting noticablely lower fps in my games. With the 19", i was getting steady 60fps in cod4 with max settings, now I am getting steady 45fps. Should I get another 8800gt and SLi it so I'd get more performance? Would I get I nice improvement?