PCI slots to use for graphics cards in Mac Pro 2009

Discussion in 'Mac Pro' started by Dark Goob, Nov 2, 2009.

  1. Dark Goob macrumors regular

    Dark Goob

    Joined:
    Jun 6, 2007
    Location:
    Portland, OR
    #1
    Currently I have a GTX 285 in Slot 1, and a GT 120 in Slot 3. Slot 2 is the faster slot, which I would think would benefit the GT 120, but then it's closer to the GTX 285 that leads to overheating concerns. I'm going to run anything graphics intensive on the GTX 285-connected monitor, so any real drawback then to having the GT 120 in Slot 3? Thanks.
     
  2. 300D macrumors 65816

    300D

    Joined:
    May 2, 2009
    Location:
    Tulsa
    #2
    The GT 120 is not long enough to interfere with GTX 285 cooling.
     
  3. Dark Goob thread starter macrumors regular

    Dark Goob

    Joined:
    Jun 6, 2007
    Location:
    Portland, OR
    #3
    So in other words, put it into Slot 2 eh?
     
  4. Cindori macrumors 68040

    Cindori

    Joined:
    Jan 17, 2008
    Location:
    Sweden
    #4
    Isnt slot 3 a 8x slot? that does not saturate a gt120 in any way.
     
  5. Dark Goob thread starter macrumors regular

    Dark Goob

    Joined:
    Jun 6, 2007
    Location:
    Portland, OR
    #5
    Nope, not on the 2009 Mac Pro. Slots three and four are 4x slots. Now, obviously, Apple has no problem putting GT 120s into 4x slots, if you get the three- or four-card configs of the BTO Mac Pros. But I mean, if you have just two cards, is there any advantage to putting either of them into a 4x slot when there is an open 16x slot? If heat is not an issue, which the other poster seems to think it isn't, then... why would it matter? Wouldn't it just run 4x faster to put the GT 120 into the 16x slot?

    After all, NVIDIA says the GT 120 supports 16.0 GB/sec of memory bandwidth, which actually would require a 32x slot to fully take advantage of, if I am understanding this correctly. I mean, isn't faster always better?
     

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