so sli sucks

1 always 1 better card is better than 2 weaker ones

2 not all games support sli eg crysis

3 you ll need a high end motherboard that has two pci 16x slots elsewhere one wil run 16x and the outher on 8x thats crap and may even give you more unstable lag than perfomance since you cant split the rendering in in equal cards

4 sometimes drivers casue screen flickering while playing games and is getting resolved only if you disable it, crap

ill give away my 8600 gt 1024mb each for a 8800 gt anyone knows hows 9600 perfoms