MacBook fan runs at 6200 RPM HELP!!!

Discussion in 'MacBook' started by conor ordan, Aug 9, 2009.

  1. conor ordan macrumors member

    Joined:
    Jun 6, 2008
    #1
    I want to leave my MacBook (Black) running overnight to finish a big download but it is just so loud I cannot sleep. I checked using smcFanControl and the fan runs between 5500 rpm and the maximum speed of 6200 rpm while doing this simple task of downloading. No other application is open and Activity Monitor shows that Vuze (the download client) is only using ≈ 8% CPU. Please help, this speed is surely not normal for this level of activity, what can I do?

    Thanks, Conor
     
  2. Eidorian macrumors Penryn

    Eidorian

    Joined:
    Mar 23, 2005
    Location:
    Indianapolis
    #2
    Reset your SMC if it isn't related to your CPU load.

    Vuze is known for it's high CPU usage in general.
     
  3. Willis macrumors 68020

    Willis

    Joined:
    Apr 23, 2006
    Location:
    What feels like the middle of nowhere
    #3
    Is there something else hogging the CPU? Is there enough ventilation?

    FWIW, I've found that software kicks up the fans anyway even if it's not doing anything.
     
  4. skye12 macrumors 65816

    skye12

    Joined:
    Nov 11, 2006
    Location:
    Austin, Tx
    #4
    Mine seem to kick in when I'm watching a flash video etc for a few minutes,
    but not continuously.
     
  5. NewMacbookPlz macrumors 68040

    NewMacbookPlz

    Joined:
    Sep 28, 2008
    #5
    Normal because Flash is such a resource hog in OS X. Adobe engineers are aware of the issue but it's not a very high priority IIRC.

    OP, in Activity Monitor change the drop down menu from "My processes" to "All processes" and see if there's anything in there hogging CPU cycles.
     
  6. yoyo5280 macrumors 68000

    yoyo5280

    Joined:
    Feb 24, 2007
    Location:
    Melbourne, Australia & Bay Area
    #6
    One of my fans is broken and only spins -1 , so the other one works over time at 6200 RPMs... its a pain.

    Reset the SMC, and see if that fixes it. And check if all your fans are working.

    -Omi
     
  7. NewMacbookPlz macrumors 68040

    NewMacbookPlz

    Joined:
    Sep 28, 2008
    #7
    What kind of laptop do you have? MacBooks only have 1 fan, same with the 13" Pro...the 15/17" models are the only ones with two fans.
     
  8. yoyo5280 macrumors 68000

    yoyo5280

    Joined:
    Feb 24, 2007
    Location:
    Melbourne, Australia & Bay Area
    #8
    Eh? I am a blackbook? So that might be why my right fan always spins -1 RPM... so why is my fan literally always at 6200 RPM from the second I log on. And the computer heats up waaay hotter than my moms whitebook.. I am afraid its a fire hazard! :s
     
  9. NewMacbookPlz macrumors 68040

    NewMacbookPlz

    Joined:
    Sep 28, 2008
    #9
    Sounds like an SMC reset and PRAM reset may help out. The only other thing I can think of is if you have a process hung up in "All Processes" in Activity Monitor or your temp sensors aren't sending the signal properly.

    But yeah, only 1 fan in the MacBooks.
     
  10. yoyo5280 macrumors 68000

    yoyo5280

    Joined:
    Feb 24, 2007
    Location:
    Melbourne, Australia & Bay Area
    #10
    I have done SMC and PRAM reset, and it still happens after fresh restarts etc... I think it may be the temp sensor for heat sink A. that has always been highest and I look at it now, it says -1...
     
  11. NewMacbookPlz macrumors 68040

    NewMacbookPlz

    Joined:
    Sep 28, 2008
    #11
    Yup, that'll do it. CPU and Heatsink A are just about the same thing (on die vs heatsink) so if one is dead that'll probably send the fans crazy.

    It shouldn't really run too hot then, just the fans going nuts. I guess you could install SMC Fan Control and pull the fans down to a more reasonable speed for light use (2000-3000rpm) and then manually turn them up if you start doing something CPU intensive.
     
  12. yoyo5280 macrumors 68000

    yoyo5280

    Joined:
    Feb 24, 2007
    Location:
    Melbourne, Australia & Bay Area
    #12
    SMC fan control doesn't have anything to reduce the maximum fan speed.

    Is there any way I can fix this?
     

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