I am looking into buying a new video card. I currently own a GeForce 7950GT 512mb. I was wondering if SLI'ing it would give me more power than a GeForce 8800 GTS. I went to Tom's Hardware but he only compares single card setups. He does have the 7950 GT2 as being more powerful, but I dont know if that would be a good representation of two 7950GT cards SLI'ed. Next, I was wondering if a 7 series GeForce card(DirectX 9) would run DX10 games in Vista. I have been teeter tottering on installing Vista but I would only do it for the DX10 game. If I need an 8 series card to run DX10, then I'm just gonna buy an 8800 GTS.