Mac Pro PCI Fan speed in Mavericks

Discussion in 'OS X Mavericks (10.9)' started by Studio K, Oct 8, 2013.

  1. Studio K macrumors 6502

    Studio K

    Feb 17, 2013
    United States
    I'm using an unsupported graphics card (GTX 650) in a 2009 Mac Pro.

    I've noticed that, after roughly one hour, PCI fan speed rises from the usual, default 800 rpms to 1000 rpms. It is a gradual process taking 20 minutes or so. Nothing in particular seems to trigger this.

    This occurred in developer previews and continues in GM.

    Rebooting back into Mountain Lion will bring the fan speed back down to 800.

    If any of you have a Mac Pro, please let me know if you are having the same experience.

    Thank you.
  2. pastrychef macrumors 601


    Sep 15, 2006
    New York City, NY
    Mine are about 100rpm higher than under Mountain Lion.

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