Re: did somebody try to run two different videocards??
I tried a similar thing myself a couple of nights ago. It failed miserably, although, that was with a 3850 and an x1800xl. I don't recall my luck being any better when I tried the 3850 alongside an 8600gt, though, and my board is also a P35 (an Asus P5K).
It seems that it would work if you were using an nVidia chipset and nVidia graphic cards. But with us Intel folks, we seem to be screwed.