Mac Pro 2008 3,1 3 Displays not working

Discussion in 'Mac Pro' started by macmac13, Mar 6, 2015.

  1. macmac13 macrumors member

    Jun 8, 2013
    So I just finished installing Yosemite (fresh install), and I cannot for the life of me get my three monitors to work. I have a flashed 7950, reference, and I can get all four ports to work, just not more than 2 at a time. I also have a flashed 6870 that I can get 3 displays working with on my Hackintosh, but I still cannot get it to work on my Mac Pro. Any workaround?
  2. MacVidCards Suspended

    Nov 17, 2008
    Hollywood, CA
    I'm going to guess that you are using dp to dvi adapters ? (Or the equiv)

    Call me Kreskin.

    If none of your displays have REAL DP input Google "active DisplayPort adapters"

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