Resolved What are normal fan speeds for a 2009 Mac Pro?

Discussion in 'Mac Pro' started by PowerMac G4 MDD, Dec 6, 2015.

  1. PowerMac G4 MDD macrumors 68000

    PowerMac G4 MDD

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    #1
    I have an 8-core, 2.26Ghz Mac Pro 4,1. I booted it from a clean installation of El Cap, and it was running nice and quiet.

    The HDD was just a test, though; my SSD from my 2006 Mac Pro (which still has my previous contents on it) just went into the 2009 Mac Pro. Upon boot-up, the fans revved up high and then slowly settled back down... but not as low as before - still a bit loud.

    So what ARE normal fan speeds for this?

    Mine:

    PCI: 1431
    PS: 889
    EXHAUST: 499
    INTAKE: 599
    BOOSTA: 928
    BOOSTB: 927
     
  2. h9826790 macrumors 604

    h9826790

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    #2
    It's the PCIe fan, run Luxmark once will fix it (no need to run the whole test, just stress the GPU a bit is enough. Any other software that will stress the GPU also work). Or you can use MacsFanControl to force it back to 800RPM.

    This is a known bug. No fix yet. A SMC reset may fix it, or may make the PCIe fan spin even faster.
     
  3. PowerMac G4 MDD thread starter macrumors 68000

    PowerMac G4 MDD

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    #3
    I'll try it, but how would a benchmark fix it? (BTW, I put a hotter GPU in, but it seems like it just got way louder than it should be. It's louder than my 1,1 Mac Pro, and it had the same GPU in it. I wonder if it has to do with this SSD I put in. Everything was fine with a clean install, but this SSD has the old user on it from my 1,1. Northbridge chip is also 10F hotter.
     
  4. PowerMac G4 MDD thread starter macrumors 68000

    PowerMac G4 MDD

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    #4
    BTW, do you think a fresh installation of Mac OSX will help?
     
  5. PowerMac G4 MDD thread starter macrumors 68000

    PowerMac G4 MDD

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    #5

    UPDATE: I ran the test and it went back down to 799!! Thank you so much - I appreciate your advice! You just saved me hours of worry and distraction from my work. Now we'll see if it remains this low for good. It's odd that it immediately fixed it; I wonder why that is. Also, is this a generally permanent fix, or do you think I'll have to run this the next time I boot my machine up from a cold standstill?
     
  6. h9826790 macrumors 604

    h9826790

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    #6
    It depends. For me, it only happen few times, but I seldom shut down my Mac.

    For some users, they encounter this on every single cold boot. So, some of them actually let the OS auto run a benchmark after login.

    Clean install won't permanent fix it. None of any reset can permanent fix it as well.

    A virtual permanent fix is use MacsFanControl to manually tune the fan profile, you can keep it at 800RPM, or spin up at certain temperature. It will override the system setting, so override the bug as well.
     
  7. PowerMac G4 MDD thread starter macrumors 68000

    PowerMac G4 MDD

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    #7
    Cool - thanks for that advice; you saved me so much trouble. I'll be monitoring my Mac from now on.
     
  8. PowerMac G4 MDD thread starter macrumors 68000

    PowerMac G4 MDD

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    #8
    Cool - thanks for that advice; you saved me so much trouble. I'll be monitoring my Mac from now on.
     
  9. adam9c1 macrumors 65816

    adam9c1

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    #9
    I highly recommend Temperature Gauge Pro (the non App Store version).

    You can manually fine tune fan speeds based on presets. Alert you when triggered. Etc. there is a demo available and creator very fast to respond to questions.
     
  10. PowerMac G4 MDD thread starter macrumors 68000

    PowerMac G4 MDD

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    #10
    Okay, I'll check it out if I have any other issues. That benchmark, though, fixed everything.
     
  11. PowerMac G4 MDD thread starter macrumors 68000

    PowerMac G4 MDD

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    #11
    Update: So I re-installed my OS today (which had NOTHING to do with my fans - I was just doing a clean install), and my PCI fan revs up as usual and is fixed with Luxmark... however, now my BOOSTA and BOOSTB fans are at 1113 RPM (from their normal 928 RPM), and Luxmark is not fixing them! Do you know what the issue could be?
     
  12. h9826790 macrumors 604

    h9826790

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    #12
    My guess would be some background operation (e.g. indexing) after the OSX re-installation cause some CPU usage which eventually cause the fan to spin up.

    Just leave it, and it should back to normal later.
     
  13. pastrychef, Dec 18, 2015
    Last edited: Dec 18, 2015

    pastrychef macrumors 601

    pastrychef

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    #13
    Normally, when idling, my fans are:

    Booster 1: 1113
    Booster 2: 1113
    Exhaust: 600
    Expansion Slots: 800
    Intake: 600
    Power Supply: 600
     
  14. PowerMac G4 MDD thread starter macrumors 68000

    PowerMac G4 MDD

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    #14
    That's what I was thinking, but my Activity Monitor showed no signs of indexing anything. Maybe Mac OSX does this in the background these days.
     
  15. PowerMac G4 MDD thread starter macrumors 68000

    PowerMac G4 MDD

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    #15
    None of my go above 1000, normally.
     
  16. pastrychef macrumors 601

    pastrychef

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    #16
    I have never seen my booster fans below 1113. Weird...
     
  17. m4v3r1ck macrumors 68020

    m4v3r1ck

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    #17
    Tried this tweak, worked like charme!

    Cheers
     

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