http://www.newegg.com/Product/Product.asp?Item=N82E16817103478 the Sparkle 550 watt single 12v line or http://www.newegg.com/Product/Product.asp?Item=N82E16817104982 the FSP group 550 watt with duel 12v line? I plan to use it for my computer with 2x 6800 gt and probably 3700 San Diego with 1gb of pc 4000 ram and I'll probably overclock everything to the max too... I can't decide which one is better cause I don't know much about PSUs any help is greatly appreciated.