Thing is, Nvidia decided to be bastards and make the 8800GTX (not sure about GTS) SLi compatable only with x16 x16, but hopefully a hacked driver can fix that problem. So if you want to SLi G80s, you need a 680i board. But hell, if you have enough money, might as well wait for the DFI 680i board or get the ASUS striker.