Why aren't the iMac fans throttled?

Discussion in 'iMac' started by daneoni, Aug 28, 2007.

  1. daneoni macrumors G4

    daneoni

    Joined:
    Mar 24, 2006
    #1
    On the notebooks the fans are throttled, they speed up when the CPU is under heavy use and throttle down at idle speeds. However the iMac fans seem to remain at 1200rpm (CPU HDD) or 999(optical drive) regardless of usage

    Anyone else notice this?
     
  2. mrkramer macrumors 603

    mrkramer

    Joined:
    Jul 11, 2006
    Location:
    Somewhere
    #2
    I would guess that since the case is so thin they have to be on all of the time to keep it from overheating.
     
  3. oduinnin macrumors regular

    Joined:
    Aug 3, 2007
    Location:
    Planet Earth
    #3
    The two fans in my MacBook Pro pretty much stay at 1000 RPM, give or take 10 RPM. The only time they run faster is when I'm compressing video or writing video to DVD. :cool:
     
  4. Craiger macrumors 6502a

    Craiger

    Joined:
    Jul 11, 2007
    #4
    I think that they are throttled, but it takes a lot for them increase their RPM's. I remember them increasing slightly when I was watching an HD show on-line while also playing with google earth and a few other apps.
     
  5. Dimwhit macrumors 68000

    Dimwhit

    Joined:
    Apr 10, 2007
    #5
    The fans on my MBP never go below 2000rpm. Even with a cooling stand blowing cool air on the bottom.
     
  6. daneoni thread starter macrumors G4

    daneoni

    Joined:
    Mar 24, 2006
    #6
    So overall default fan speeds seem to have increased BUT won't having the fan at 1200rpm ALL the time wear out the bearings quicker?
     
  7. Santa Rosa macrumors 65816

    Santa Rosa

    Joined:
    Aug 22, 2007
    Location:
    Indiana
    #7
    That is sort of like saying you would rather they werent on at all?

    Fans not on constantly = cooked Mac :)
     
  8. daneoni thread starter macrumors G4

    daneoni

    Joined:
    Mar 24, 2006
    #8
    Yeah i know. Would havebeen nice if the fans throttled down to 999rpm or something when the machine was idle. Then again they're at 1200 for a reason so who am i to argue with Apple engineers.
     

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