I have a Dell XPS 700 and was having issues with the Geforce 7950 GX2 that it came with so I decided it was time to upgrade. So I got a Radeon 4850x2 and I uninstalled the nvidia drivers and installed the 4850 but now I don't get a picture on my monitor. I know the motherboard is SLI and the card is crossfire but I thought the crossfire for the 4850x2 was driver based. And I don't think that the XPS doesn't have any integrated graphics to turn off. Please help.