Odd high pitched noise from G5 when using 3d (on Tiger)

Discussion in 'Macintosh Computers' started by Xenious, May 5, 2005.

  1. Xenious macrumors 6502a

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    Mar 22, 2004
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    Texas, USA
    #1
    I'm having a really strange issue after installing Tiger. When I run apps that use 3d graphics (ie Wow or the RSS screen saver) i hear this high pitched rhythmic noise. I opened up the case to try and pin point it and it seems its coming from around the CPU area (I have a dual 2.5 G5). I thought it may be a fan on the graphics card but the 9600xt doesn't have one. I dusted the fans and case just in case but it didn't help.

    Is anyone else hearing this noise? It almost sounds like a small fan that is spinning a bit roughly. Are there any secondary fans inside the CPU area?

    Update: I found a thread on the apple discussions with similar symptoms
     
  2. wrc fan macrumors 65816

    wrc fan

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    In a world where LPs are made like pancakes
  3. Xenious thread starter macrumors 6502a

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    #3
    replying to other thread now, but I have a Radeon 9600XT
     
  4. JonD macrumors member

    Joined:
    Jul 16, 2002
    #4
    The EXACT same thing has been happening to me in my dual 2 G5, also with the 9600. To fix the problem go into the System Prefs, select the "Processor" section, and uncheck the "Allow Nap" check button. I heard that Apple recommends for some reason that you don't do this, but that high pitched sound drove me insane.

    I haven't heard it since.
     
  5. Xenious thread starter macrumors 6502a

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    Mar 22, 2004
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  6. wrc fan macrumors 65816

    wrc fan

    Joined:
    Jan 19, 2003
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    In a world where LPs are made like pancakes
    #6
    It is part of the CHUD developer tools. It is not installed by default.
     

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