Graphics card on secondary PCIe slot PUE 975X

Question

I changed my graphics card slot to the secondary PCI express slot. But now none of my operating systems will boot correctly with the nvidia graphics driver. Only when set on failsafe mode or vesa drivers (linux), is the only way to render the desktop environment. Is there any way to have my graphics card on the 2nd slot and for it to work correctly? I am using a Nvidia Geforce 6800GS.

Answer 1

You are right. Using the 975X PUE, you can use 2 nVidia cards in the PCIe 16X slots(they will run at 8x) and should be able to be used with 3 monitors.  The 2 slots can be used in a crossfire configuration(2 ATI cards);ATI's answer to SLI. Using nVidia cards, you should be able to use 2 PCIe cards and get the 3 monitors since they obviously would not be in crossfire(and not in SLI since the board can not do SLI). Your PCI card is an ATI chipset and the PCIe card is nVidia. Since you have both nVidia and ATI drivers installed and being used, I think you maybe getting a conflict (which is likely causing the issue).  If you had PCI nVidia card, it might work.
When cards are in Crossfire or in SLI mode, only 2 monitors will be supported. If SLI or Crossfire is disabled, you should be able to get up to 4 monitors.  See if you can borrow your friends nVidia card and try it out. I would advise you to uninstall any ATI drivers.  You are going to need an additional nVidia card(PCIe or PCI).