Setting up Dual GTX 680 in 5,1 Mac Pro

Discussion in 'Mac Pro' started by m3rob, Mar 25, 2015.

  1. m3rob macrumors member

    Dec 28, 2010
    I would like to use an external power supply to power the second GTX 680 card for my 5,1 Mac Pro. I have read a lot about the subject on the forums, but the PSU units that fit in the 5.25" CD bays that many recommended in the past are not easy to find online (ReVisioned 450W Drive Bay Graphics Card Power Supply). I would like to just use an external PSU, but I would like to trigger on the second PSU when the main computer switch is turned on. The adapter that was recommended for the previously mentioned PSU to connect to the CD Rom Bay SATA was:

    Would I use that same connector if I bought an external PSU like this? Is this a good eternal PSU to get? Any other recommendations?

    Thanks so much in advance!

  2. xcodeSyn macrumors 6502a

    Nov 25, 2012
    Then you also need a 2nd PSU trigger like this one. See the reviews on how it is connected.
  3. AndreeOnline macrumors 6502


    Aug 15, 2014
    You might want to keep an eye on my current build, where I try to create two new 8 pin connectors straight from the built in PSU.

    My thread is called Pixlas 4.1 Mac Pro mod.
  4. m3rob thread starter macrumors member

    Dec 28, 2010
    Yes, I am really looking forward to what you come up with. So much more simple than adding an additional PSU!

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