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Will an x4 pci-e slot bottleneck a video card?

hi guys i have crossfired 2 6770's but unfortunetly im seeing less performance. Could this be caused by the x4 slot?
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  1. Best answer
    It is a settings issue, although x4 supports CF it is not recommended it should though increase performance not decrease it.
  2. thanks man ill look into the settings a bit
  3. If you just installed the second card did you reinstall the drivers?
  4. ok my psu wasnt giving power to the second card for some weird reason so i switched the power to a 6 pin to molex adapter and it seems to be working fine now. Thanks for the quick response :) (PS. I have a 750w PSU so not enough power isnt the problem)
  5. rolli59 said:
    If you just installed the second card did you reinstall the drivers?

    yes i did. again thanks for the reply!
  6. Best answer selected by toepickles.
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