Vista is the only way to use Quad SLI. And you people are reading too much into the score. That score is 1 video card. 3 are essentially disabled. I still have quite a bit of tweaking to do.
i've said this a bajillion times.. in many different threads.... this card DOES NOT score amazinglyin quad SLi n ANY kind of way on default res 3dmark06.... you're better off trying to score w/ 1 card.. and your probably not gonna be seeing 25k unless your running 4.0+ghz ... and probably not low 4.0ghz either...
the 9800gtx is only 512mb, and even tho the 8800gtx has higherr memory bus and more ram, the 9800gtx still has a higher memory bandwith the the 8800gtx, and outperform the 8800gtx in anything up to 1920x1200, at 2560x1600 it becomes balanced.