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5770 Crossfire Disabled Adapter problem

Discussion in 'AMD / ATI' started by Teckman, May 21, 2011.

  1. Teckman New Member

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    Hello, I am having a problem enabling Crossfire with two Sapphire 5770 cards.

    In CCC one of them always shows as "Primary Adapter" and the other as "Disabled Adapter". There is no option for Crossfire.

    I have tried:
    -Flashing the BIOS of the older card. One is a second generation Sapphire HD 5770, the other is the newest (third). I just purchased the newer one.

    -The latest revisions of the 10.x and 11.x drivers

    -Switching the cards' PCI slots

    -Plugging my monitors into either card.

    My system is:
    Core i5 2500k
    8gb
    p8p67 rev 3.0
    Fresh Windows 7 install


    Thank you for your help
     
  2. Teckman New Member

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    fixed by changing pci speed to 4x in BIOS
     
  3. 2DividedbyZero New Member

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    changed to x4

    from what? i assume it was at x1?
     
  4. Law-II

    Law-II

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    Hi @ 2DividedbyZero

    The P8P67 is not intended for full support of crossfire, x4 on PCIE should not notice unless running a 6990 that would require x16 on the PCIE

    Slot support for P8P67
    1 x PCIe 2.0 x16 (single at x16)
    1 x PCIe 2.0 x16 * (max. at x4 mode [Black])
    2
    3 x PCI
    *The PCIEX16_2 slot shares bandwidth with the PCIEX1_1 slot, PCIEX1_2 slot and USB3_34 connector. The PCIEX16_2 runs at x1 mode by default for system resource optimization.

    atb

    Law-II
     
    Last edited: May 21, 2011

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