Mac Pro 3.1 Problem with ATI 5870

Discussion in 'Mac Pro' started by Robjw, Nov 1, 2014.

  1. Robjw macrumors newbie

    Joined:
    Dec 13, 2007
    #1
    Hi,

    My Mac Pro 1.1 recently died completely - I suspect the PSU.

    I hunted around for a replacement, and have ended up with a second 1.1, and now a bargain 3.1.

    The 3.1 came with a flashed PC card, apparently a GT120. With that card, it works perfectly. However I have a 5870 from my dead 1.1. With this card installed I get horrible graphics corruption in both Yosemite and Snow Leopard. Interestingly it works OK in Snow Leopard (albeit sluggishly) until I install the 10.6.8 combo update, and then it craps out straight away.

    I thought that whatever had killed my 1.1 had also killed my 5870, but having tried it in my replacement 1.1, it works perfectly. As far as I know the 5870 should work in the 3.1 as well as it does in the 1.1.

    Anyone any ideas?
     
  2. 666sheep macrumors 68040

    666sheep

    Joined:
    Dec 7, 2009
    Location:
    Poland
    #2
    Yeah, reset NVRAM content on a 3,1. Should help.
     

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