If you are after Quad SLI with two 9800GX2 cards you can forget about -aying under XP. Nvidia clearly said that at least for the time being Quad SLI driver works only under Vista.

Both Vista 32 and 64bit are included but so far the current Forceware 174.53 for XP doesn’t have support for Quad SLI.

Maybe it is time to move to Vista and play games, but traditionally games run a bit slower on Vista than on XP, at least this was the case for a long time.

You can get the XP driver without Quad-SLI support here and we will try to ask Nvidia if there are future plans for Quad SLI support under Windows XP.