MacBook running hot due to System CPU usage?

Discussion in 'MacBook' started by maximus06, Jan 17, 2009.

  1. maximus06 macrumors regular

    Joined:
    Nov 5, 2007
    #1
    I've been monitoring the CPU temperatures on my 2 week old alu macbook frequently, and it always hovers at ~42 degrees celsius.

    However, today something odd happened, all of a sudden the computer was getting noticeable hotter (the fans remained off though), when I checked CPU temp it was up to 72 degrees.

    I checked with "Activity Monitor" and nothing was using up more than 2% CPU. Then I saw through iStatPro that system CPU usage was at 40%. What the hell? Its usually at 2-5%...i.e. always.

    After restarting, the system cpu usage was back down to 2% and the temperature slowly dropped back to its norm. Anyone have this happen?
     
  2. JamesGorman macrumors 65816

    JamesGorman

    Joined:
    Dec 31, 2008
    Location:
    Winnipeg
  3. SOLLERBOY macrumors 6502a

    Joined:
    Aug 8, 2008
    Location:
    UK
    #3
    I got this the other day, al;so get it with my imac, pretty sure it's just a conflict between the system and istat.
     
  4. hamzab macrumors 6502

    Joined:
    Oct 7, 2008
    #4
    Check how much activity usage WindowServer is using up?

    Do you happen to have a lot of Widgets installed? If so, maybe their causing it to heat up more

    Hamza
     
  5. maximus06 thread starter macrumors regular

    Joined:
    Nov 5, 2007
    #5
    Not that many widgets, maybe 3 extra ones. You don't get +32 degrees celsius from widgets.
     
  6. hamzab macrumors 6502

    Joined:
    Oct 7, 2008
    #6
    Belive me mate, I had this one Widget, it showed me fan speed, as in it actually showed how fast the fan was spinning, cant remember its name, I went on activities and saw that WindowServer was using something like 40% of CPU! I took off this widget and immediately saw a reduction in CPU usage which lead to drop in heat

    Just my 2 pence mate
     
  7. lr4life macrumors newbie

    Joined:
    Jun 17, 2008
    #7
    I have had the same problem.

    The same exact thing was happening to me.
    My computer was constantly extremely hot and my battery life had taken a noticeable hit.

    A quick check with my Activity Monitor and a glance at mt iStat menu bar tool revealed to me that something was running at almost FULL capacity while my computer simply sat with an iTunes and a Firefox window open.

    The culprit was iAntiVirus!
    It was using up to 98% of the processing power of one of my Intel cores.
    Why it felt the need to do so, is still a mystery to me, but since then my CPU usage has been back down to around 5% on each core for casual use.

    If you have iAntiVirus, then get rid of it ASAP.
     
  8. RiCEADDiCTBOY macrumors 6502a

    RiCEADDiCTBOY

    Joined:
    Dec 26, 2007
    #8
    memory leak? poor coding?

    programs can be system hogs...
     

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