SCM Fan Control on MP

Discussion in 'Mac Pro' started by rockinrocker, Apr 1, 2008.

  1. rockinrocker macrumors 65816


    Aug 21, 2006
    has anybody gotten this to work right on the '08 MP's?

    everything installs fine, but the fan controls don't effect the right fans. so for example, turning up the CPU fan actually effects both the CPU and the exhaust fans....

    any ideas on how to get this working right? or are there any alternatives?

  2. 617arg macrumors 6502

    Mar 3, 2008
    I'm having some problems with it too.

    The fans are working at the rpm I set for them....all except for the Power Supply fan. That one stays at 600 rpm regardless of where I set it to.
  3. scottydawg macrumors 6502


    Jan 22, 2008
    Sacramento, CA
    The power supply fan can not be changed with SMC ;)
  4. 617arg macrumors 6502

    Mar 3, 2008
    hmmmm.......that's weird. why does it let me adjust it in preferences then? or does "ps" stand for something else in smcFanControl?

    Attached Files:

  5. rockinrocker thread starter macrumors 65816


    Aug 21, 2006
    the other weird thing is that changing the cpu fan effects both it and the exhaust fan, while adjusting the exhaust doesn't do anything....
  6. 4JNA macrumors 68000


    Feb 8, 2006
    looking for trash files
    the power supply 'PS' slider shows when running on the first gen MP also, but it has no effect on the fan speed. saw one thread that stated the fan in the power supply was thermally managed, that is, not hardware controlled, but speeds up or down based on an internal thermistor (temp monitor). the MP just watches to see that it's spinning, but has no control over the fan.

    no idea on the combo/fan problem, as it works fine on my first gen. everything works as labeled except 'PS'.
  7. davepk macrumors member

    Nov 20, 2006
  8. Infrared macrumors 68000


    Mar 28, 2007
    I can control my PSU fan by turning on heaters in the room :)

    It responds to ambient temperature by the look of it, rising
    in 20 RPM steps.

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