Dual GPU question. GT120 + R9 270x?

Discussion in 'Mac Pro' started by fiatlux, Feb 25, 2014.

  1. fiatlux macrumors regular

    Joined:
    Dec 5, 2007
    #1
    I have a cMP with a vanilla GT120 card.

    Since I essentially do photo stuff (Lightroom 99% of the time), this card served me well, including on a 30" display.

    But there are times where I would maybe like to test OpenCL or benefit from some boost in some occasional rendering (video is a very occasional hobby).

    Can I just drop any GPU in the second slot, and keep the display on the GT120? Can I mix and match AMD and nVidia? An AMD R9 270x looks like a good deal for instance.
     
  2. teameurox macrumors regular

    Joined:
    Oct 26, 2010
    #2
    You should be fine in dropping the 270x in the machine. When I first got my cMP I had a 7300gt and a flashed HD5770 all worked well. The only issue I had was the conflict with windows drivers between Nvidia and ATI/AMD if you Bootcamp. IF its solely OSX you should be golden.
     
  3. fiatlux thread starter macrumors regular

    Joined:
    Dec 5, 2007
    #3
    Thanks.

    It looks like OpenCL apps enumerate OpenCL devices and will use any device installed in the system for computing, irrespectively of which one is used for display.

    I guess that for what games concerns (not that I play), acceleration would only work if the card if connected to a display?
     

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