MP 3,1 - GTX 680 - Power Supply make high-pitched sound

Discussion in 'Mac Pro' started by giviz, Aug 27, 2014.

  1. giviz macrumors member

    Jun 28, 2014
    Hi guys,

    I have a Mac Pro Early 2008 3,1 and I recently buy a GTX 680.

    I have plug 2x24" 1080p monitors and 1x40" 4K monitor on it.

    That's working pretty great, but since 2 weeks there is a high-pitched sound that came from the power supply.

    The computer is still working great, but the sound is really annoying.

    Maybe 3 monitors are take too much power from the original power supply and I need to replace it ?

    If so, is there a compatible power supply that can deliver more power that you can suggest to me ?

    Thanks a lot !
  2. cebseb macrumors regular

    Feb 21, 2011
    Two possibilities for the noise.

    1) an increase in fan speed is causing the whine

    2) a capacitor is about to fail

    If it were my machine, I would seek for a replacement immediately (the power supply that is) since I depend on it for work.

    Your current power supply is more than enough to handle your setup, but it's just showing its age.
  3. giviz thread starter macrumors member

    Jun 28, 2014
    I agree, buying a new power supply seems to be the best option here.
    Are you sure the original one as enough power for my setup ? As I remember the GTX 680 take way much power than the original GT xxxx and I suspect that's why the power supply is now tired.

    I will go to the Apple store to see if they still sell power supply for the old Mac Pro.
  4. cebseb macrumors regular

    Feb 21, 2011
    They do not sell it, but there are PLENTY available for sale on eBay from canabalized units.
  5. Macsonic macrumors 65816


    Sep 6, 2009
    Sometimes power supplies for Mac Pros are being back ordered in ome Apple Stores and you can try asking. If the PSU is not available, you can try some eBay sellers

    The 2008 Mac Pro is still adequate up to today. Just try keeping the interiors clean from dust.
  6. giviz thread starter macrumors member

    Jun 28, 2014
    Thank you guys, I will buy one from ebay, it will be easier.

    Bye !
  7. cebseb macrumors regular

    Feb 21, 2011
    Just make sure the whining is actually coming from the PSU and not from the fan or another source!

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