You pretty much need a motherboard with an nVidia chipset.
Ok that helps. Now your decision depends on graphics.
AMD? You will need an Intel board.
nVidia? Well, you will need an ..ahem.. nVidia based MOBO.
ok, i am going for a quad 9300 intel....i have short listed three mother boards, Asus P5KC LGA 775 , Asus P5N-D LGA 775 and Asus P5N-E-SLI L775.
Ok P5KC is for crossfire (ATI CARDS),P5N-D is for SLI with the 750i chipset, and the P5N-E is for SLI but with the older 650i chipset. I dont know alot about nVidia chipsets sorry! what graphic cards are you looking at?
thanks anyway....i'm looking at the 9900gt
So if you are going with nVidia and going to eventually use them in SLI, you will have to stick with an nVidia based MOBO.