I'm having problems with my PNY Nivida GeForce 7900 GS Dual-DVI 256 MB PCI-E card. As soon as my X-server starts my monitors go black. I can hear programs start (sounds.) I have two 1440x900 lcd monitors. MSI-7501 motherboard. AMD Phenom II X4 920 CPU. 4GB Crucial RAM. Fedora 14 X86_64. Any ideas?