This is sort of on topic. In an attempt to free up a pcie slot for a very slow gt430 I moved a 4850 to my cruncher1 box. It now has a 6950 in the pcie x16 slot and the 4850 is in the pcie x1 slot. These are both crunching mw (sorry, can't go for credits all the time.) What I found interesting is that the wu times are about the same...cool. Anyway, to get them to work I did have to open Catalyst and extend the desktop, but I did not have to use a dummy plug...this is with an XP OS. BTW, I put the gt430 on DiRT cuda for a few more credits...Al