Is my Power Supply Fan Dead or Defective?

Discussion in 'Mac Pro' started by astrostu, May 16, 2008.

  1. astrostu macrumors 6502

    Feb 15, 2007
    Today, for the first time in a week of running very heavy loads (6 of 8 processors at 100% for 24 hrs/day for nearly a week), my MacPro's "Power Supply 2" temperature suddenly rose to ~207 °F (~95 °C).

    I got a large external fan going through the desktop to bring the temperature down. I also tried to install smcFanControl to see if I could bump up the internal fan speed. Well, I could bump up THREE of the fans (I/O, CPU/Memory, and Exhaust), but it says that the PS fan is steady at just under 600 rpm, despite me cranking it up in the software to anything else (including the max, 2800, and anything less).

    So, at least according to smcFanControl, the power supply fan IS running, but I can't get it to run any faster. I'm assuming this is bad, and there's something wrong. Any ideas?
  2. Infrared macrumors 68000


    Mar 28, 2007
    In the past smcFanControl could not change the power supply fan
    speed. I presume that is still true. There's a thread about it in
    here somewhere ... <clickety click click click> ... there you go:
  3. astrostu thread starter macrumors 6502

    Feb 15, 2007
    Okay, thanks. I did do a search, but I searched for "smcfan control" and then "smc fan control" which is why I must not've seen that thread you linked.

    I'm still a bit perplexed about why the PS2 got so hot yesterday (it seems to be fine today).

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