Mac Pro Fan issue at start-up

Discussion in 'Mac Pro' started by HSJR, Aug 28, 2014.

  1. HSJR macrumors member

    Mar 26, 2009
    Hi all,

    My Mac Pro 4.1 Fan does not run at full speed upon switch on my Mac. I don't really know if that sound serious or not?
    I did a SMC reset with no success. I checked the CPU and GPU temperature at heavy load and both were at 80 C. I haven't done this step before, so I am not sure if these temperature reading are normal for Mac Pro at heavy load or not.

  2. ScottishCaptain macrumors 6502a

    Oct 4, 2008

    The Mac Pro fans have never run at "full speed" during power-on. Sometimes the GPU fan will kick it up a notch prior to login, but that depends on the GPU.

    Unless I'm misunderstanding you, nothing is wrong with your computer as long as the fans are spinning.


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