Fan Question

Discussion in 'Mac Pro' started by filman408, May 19, 2007.

  1. filman408 macrumors regular

    Joined:
    Sep 4, 2006
    Location:
    San Jose, CA
    #1
    Whenever I wake up my mac pro (see sig) from sleep, the fans always turn on at full force for around a minute. This is the only time I really ever hear the fans. I am curious if anyone knows why this happens.
    Even with the processors at 700-800%, the fans are rarely audible.
     
  2. bld44 macrumors 6502

    Joined:
    Apr 21, 2007
  3. filman408 thread starter macrumors regular

    Joined:
    Sep 4, 2006
    Location:
    San Jose, CA
    #3
    I wouldnt doubt the x1900 plays into all this, but the sound is definitely NOT soley the gpu fan. Its is also the exhaust (bottom rear) and cpu fan (botom front). iStat pro shows those 2 fans reving up to ~1500rpm after waking up, when they idle around 600rpm and when the processors are chugging around 900rpm.
    It sounds kind of like a jet is taking off.
     
  4. patrick0brien macrumors 68040

    patrick0brien

    Joined:
    Oct 24, 2002
    Location:
    The West Loop
    #4
    -filman408

    Yes, it's the 'dustbuster' action - it's a good thing.
     
  5. filman408 thread starter macrumors regular

    Joined:
    Sep 4, 2006
    Location:
    San Jose, CA
  6. Peligro macrumors newbie

    Peligro

    Joined:
    Feb 26, 2006
    Location:
    Chicago
    #6
    Wait a second, I have the exact same problem. Only with a 4 core.

    I normally have this:

    [​IMG]
    When I wake it up I get this:

    [​IMG]
    I don't think this was happening before...
    Is the conclusion here that this is a good thing?

    I dunno. I'm worried.
     
  7. FF_productions macrumors 68030

    FF_productions

    Joined:
    Apr 16, 2005
    Location:
    Mt. Prospect, Illinois
    #7
    I don't get the loud fan noise that every one else is getting.

    I have 5 hard drives that spin down and then spin back up when I wake up the Mac Pro.
     
  8. THX1139 macrumors 68000

    THX1139

    Joined:
    Mar 4, 2006
    #8
    Mine does this. I don't understand why you think it's a problem. Why does it matter that your fans rev up for a few seconds? Are you bored?
     
  9. Cybergypsy macrumors 68040

    Cybergypsy

    Joined:
    May 16, 2006
    Location:
    Central Florida!
    #9
    My macbook was noisy, my MBP is silent....love it that way :)
     
  10. Peligro macrumors newbie

    Peligro

    Joined:
    Feb 26, 2006
    Location:
    Chicago
    #10
    Bored? No.

    I dunno. I don't think they were revving up like this before. And you know what? I haven't bought a good APC yet and with the storms we've been getting, I have been shutting down and unplugging when I am not using it for awhile. Since then when it goes to sleep and I wake it... No revving up.

    Go figure.

    Maybe it just needed to breathe for a bit.
     

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