Maximum cpu temp, how many fans?

Discussion in 'MacBook' started by douglh, Jul 24, 2009.

  1. douglh macrumors member

    Joined:
    Nov 10, 2008
    #1
    My 13 inch unibody Macbook is currently running at 81C. Isn't that high? What's the maximum temperature? The fan(s) run constantly.

    I have a fan utility that lists 2 fans. The "Left" fan is at 6204 rpm's, temp 81.4C The "Right" fan shows 0rpm's, temp -1C. Is this merely because the sensor is capable of recording two fan speeds or do I really have one malfunctioning fan? (which would explain the high cpu temp, if it applies).

    A third sensor, a widget, records the same temp, with Heatsink A 70C and Heatsink B 64C. I realize all three sensors are getting their readings from the same spot; which one do I rely on?

    EDIT: the only program I'm running (visably) is FireFox.
     
  2. NewMacbookPlz macrumors 68040

    NewMacbookPlz

    Joined:
    Sep 28, 2008
    #2
    Do you have any flash running, or any hanging processes?

    81C for an idle is a bit high. The 13" MacBook only has one fan, so don't worry about the 0rpm reading on that 2nd one.
     
  3. douglh thread starter macrumors member

    Joined:
    Nov 10, 2008
    #3
    No Flash, no Java. I use a Bluetooth mouse, I just turned it off to see if there's any difference. I also rebooted so the temp went down during the 2 minutes it was off; the temp right now is 72C and slowly climbing.
     
  4. NewMacbookPlz macrumors 68040

    NewMacbookPlz

    Joined:
    Sep 28, 2008
    #4
    Did you check in your activity monitor for any processes that are sucking up CPU cycles?

    Be sure to change the drop down to "all processes." Sometimes there may be a print spool or a widget that's gone awry and using a fair bit of CPU cycles.
     
  5. douglh thread starter macrumors member

    Joined:
    Nov 10, 2008
    #5
    Thank you! GeekTool was using ~40. I Forced Quit and my temp dropped 20+C, now at 49C. Thanks-a-bunch, I wouldn't have thought of looking there.
     
  6. xodus macrumors newbie

    Joined:
    Aug 22, 2006
    Location:
    Toronto, Canada
    #6
    In the future, the ultra fast way to do this is:

    Open Terminal

    Code:
    top
    (will then list the top 10 highest processes)

    Code:
    killall <nameofprocess>
    OR
    Code:
    kill <ID#ofprocess>
     
  7. douglh thread starter macrumors member

    Joined:
    Nov 10, 2008
    #7
    Coming from Linux I'm familiar with those commands but had forgotten they work on Mac OS as well. Thanks for reminding me!
     

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