PSU blown - Can I use a 1.1's PSU in a 3.1?

Discussion in 'Mac Pro' started by AudioVoyeur, Mar 16, 2016.

  1. AudioVoyeur macrumors newbie

    Nov 19, 2008
    I have an early 2008 (quad) 3.1 and the PSU tanked. -
    Is there anyway I can stick a 1.1's PSU in the 3.1's box.
  2. Machines macrumors 6502


    Jan 23, 2015
    Fox River Valley , Illinois
    Nope .

    Mac Pro 1,1 and 2,1 PSU are interchangeable .
    Mac Pro 3,1 PSU is unique .
    Mac Pro 4,1 and 5,1 PSU are interchangeable .

    Ideally you should replace components with matching EEE parts , but there is wiggle room .

    Blow dust out of your PSU and see if that improves its health .
  3. nigelbb macrumors 6502a

    Dec 22, 2012
    Yes according to this thread. I haven't done it myself but apparently the power supplies are the same but the wiring harness is different so you can use a 1,1 or 2,1 power supply in a 3,1 provided you have a 3,1 wiring harness (which you already have).

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