4,1 power supply noises

Discussion in 'Mac Pro' started by mattspace, Sep 22, 2017.

  1. mattspace macrumors 65816

    mattspace

    Joined:
    Jun 5, 2013
    Location:
    Australia
    #1
    So, while sitting in the quiet of an evening after putting my 4,1 -> 5,1 to sleep, I started hearing a weird clicking every 10-15 seconds. Getting down under the desk to track the source, i could hear a faint electrical hum from in the power supply, near where the power cable enters, and that appeared to also be the source of the click / pop.

    Shutting the machine down, the noise continues (I've got my ear right up to the mesh so I'm pretty sure of the source).

    Unplugging the power, sound goes away.

    Opinions? Dust cooking off / shorting on something, or "buy a spare power supply time"? Main concern is safety in terms of shorts / fire.

    Thanks.
     
  2. h9826790 macrumors G5

    h9826790

    Joined:
    Apr 3, 2014
    Location:
    Hong Kong
    #2
    220-240V from the power socket?
     
  3. mattspace thread starter macrumors 65816

    mattspace

    Joined:
    Jun 5, 2013
    Location:
    Australia
    #3
    Yeah, standard 240v Australia. Power for the mac is going through a power board with spike / overload protection etc, then a dedicated voltmeter which only has the mac connected, which reads about 243v or so, from memory.
     
  4. h9826790 macrumors G5

    h9826790

    Joined:
    Apr 3, 2014
    Location:
    Hong Kong
    #4
    I did a little bit of search about this kind of noise about 2 years ago. In the end, my own conclusion is voltage related, 110V users seems do not have this problem.

    I found may be 2-3 posts (can't remember if from this forum) about they moved from a 110V city to a 220V city, then suddenly the Mac Pro PSU create this kind of noise.

    I personally wouldn't worry about it now. I am also in a 220-240V city, and my PSU also produce this kind of noise. By considering I often stress my CPU or GPUs to 100% for days. I am sure the PSU is OK.
     
  5. mattspace thread starter macrumors 65816

    mattspace

    Joined:
    Jun 5, 2013
    Location:
    Australia
    #5
    Ahh cool, might pull it when i get the time and blast some compressed air through and see it that makes a difference.

    Cheers.
     
  6. h9826790 macrumors G5

    h9826790

    Joined:
    Apr 3, 2014
    Location:
    Hong Kong
    #6
    I tried that, the PSU run much cooler after cleaning, but the noise still there.
     

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5 September 22, 2017