Dual GFX card annoyance...

Discussion in 'Mac Pro' started by Firebar, Aug 2, 2010.

  1. Firebar macrumors member

    Joined:
    Nov 16, 2005
    #1
    So I have a GT120 for use under OS X. It's been running fine on its own.

    I happened to be given some store credit at an online retailer. I do a bit of gaming now and then so I purchase a GTX 470.

    I'd like to run both the cards side by side, using the GT120 for OS X and the GTX 470 under Windows.

    I've put the GTX470 in the bottom most PCI-E 16x slot, with the GT120 in the PCI-E 4x slot as the "helper" card.

    I can boot into Windows and use the GTX 470 no problem, very happy with it I am too. However, if I boot into OS X with my display on the GT120 I get to the point just before the login screen. I'm greeted by the typical Mac light-blue background flashing every now and then (as if its probing for monitor res) and occasionally I see the 10.6 galaxy-type background. However beyond this it doesn't do anything else, it just sits there at this point.

    Has anyone had this issue before? I'm at a loss as to how I can just get OS X to run with the GT120.

    Thanks in advance :)
     
  2. CaptainChunk macrumors 68020

    CaptainChunk

    Joined:
    Apr 16, 2008
    Location:
    Phoenix, AZ
    #2
    Have you tried the GT 120 in Slot 2? I can understand wanting to use Slot 1 for the GTX 470 (because it's double-height), but why exactly are you moving the GT 120 all the way up to Slot 4?
     
  3. Firebar thread starter macrumors member

    Joined:
    Nov 16, 2005
    #3
    As I'm typing this I'm experimenting. As you noted, I've just tried slot 2....

    So it doesn't work in Slot 3 or 4. It DOES work in slot 2. Only problem is that its very close to the GTX470 - bit worried about ventilation.

    Should note I have a 2009 Mac Pro.
     

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