1 Reply Latest reply on Jun 19, 2009 11:52 AM by unplugged_24

    D975 with 2 video cards. Is it possible?

    fgabaldon
      I have an Intel D975 and i have a GeForce 7600Gs (video card).
      I bought a new video card (GeForce 9400 GT) because i am interesting to use 2 Monitors with my PC
      While the computer have just 1 video card connected is working fine. (both cards working fine). But when i connect both at the same time (to connect 2 monitors at the same time) the computer don't start. No image.
      Do somebody know what i am doing wrong?
      Thanks for your Help
        • 1. Re: D975 with 2 video cards. Is it possible?
          unplugged_24

          Hi there,

           

          This motherboard has three PCI express x16 slots. However it should be noted that they are no exactly similar.

           

          The board provides the following PCI Express connectors:


          • One Primary PCI Express x16 (electrical x16 or x8) bus add-in card connector. The x16 interface supports simultaneous (full duplex) transfers up to 8 GBytes/sec. Single-ended (half duplex) transfers are supported at up to 4 GBytes/sec.
          • One Secondary PCI Express x16 (electrical x8) bus add-in card connector: The board provides a PCI Express add-in card connector in the form of a physical x16 connector with electrical routing of x8. This connector is an electrical equivalent of a PCI Express x8 bus add-in card connector. This connector also supports x4 and x1 PCI Express add-in cards.
          • One PCI Express x16 (electrical x4) bus add-in card connector: The board provides a PCI Express add-in card connector in the form of a physical x16 connector with electrical routing of x4. This connector is an electrical equivalent of a PCI Express x4 bus add-in card connector. This connector supports x4 and x1 PCI Express add-in cards.

           

          For optimum performance, observe the following recommendations for the PCI Express
          add-in card connectors:


          • If you are installing a single PCI Express Graphics card, install it in the Primary PCI Express x16 (electrical x16 or x8) bus add-in card connector.
          • If you are installing two PCI Express Graphics cards, install them in the Primary PCI Express x16 (electrical x16 or x8) bus add-in card connector and the
          Secondary PCI Express x16 (electrical x8) bus add-in card connector.


          The PCI Express interfaces for the Primary and Secondary PCI Express x16 connectors are routed through the MCH. The PCI Express interface for the PCI Express x16 (electrical x4) connector is routed through the ICH7-R/ICH7-DH. Therefore, the Primary and Secondary PCI Express x16 connectors provide higher performance than the PCI Express x16 (electrical x4) bus add-in card connector.

           

          Although the PCI Express specification allows x16 cards to auto-negotiate down from x16 to x4 and x1 and may function properly, such configurations have not been validated on this board. Please consult your add-in card vendor prior to attempting to use a PCI Express x16 add-in card in this connector.

           

          I assume that the graphics card you are using both require the x16 electrical routing to be able to work properly.

           

          If you want you can use either of the card you have. However if your monitors are both direct DVI input then you will have to get another graphics card that has dual DVI output, such as the 7600GT for example.

           

          Also make sure you are connecting the auxiliary PCI express power connector (on board molex connector) on the board, else there will not be enough power on the board to power up.

           

          Hope this will be helpful to you.

           

          Cheers.