My macbook fan is almost constantly on, running hot and sluggish

Discussion in 'Mac Basics and Help' started by oakiegu007, May 2, 2008.

  1. oakiegu007 macrumors member

    Joined:
    Feb 20, 2008
    #1
    I have a 2 GHz Intel Core Duo macbook. I'm running it with 2 GB of ram and on 10.5.2. In the past couple of months, my fan seems to run whenever I do anything. As a result, and I assume it slows down the cpu, everything grinds to a halt. If I view video, I get a few frames every few seconds. As I'm typing, the text is lagging. I have nothing running and my activity monitor says I have around a half gb of memory free and 40% of my cpu is idle.

    What's going on here...
     
  2. Eidorian macrumors Penryn

    Eidorian

    Joined:
    Mar 23, 2005
    Location:
    Indianapolis
    #2
    The CPU produces more heat under load and then the fans spin up. What processes are using CPU time in Activity Monitor?
     
  3. oakiegu007 thread starter macrumors member

    Joined:
    Feb 20, 2008
    #3
    hmm

    although I think I'm confused between Idle cpu and unused cpu. Under Safari, it reads 99.9 cpu. Regardless, this happens with many programs.
     
  4. Eidorian macrumors Penryn

    Eidorian

    Joined:
    Mar 23, 2005
    Location:
    Indianapolis
    #4
    Unused?

    What are you doing in Safari when this happens? What about other programs? Have you tried reinstalling OS X?
     

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  5. oakiegu007 thread starter macrumors member

    Joined:
    Feb 20, 2008
    #5
    ...

    nevermin about the unused comment.

    it depends. before i was just on the macrumors site. if i start up warcraft, go on youtube, open photoshop, run NeoOffice...

    I haven't tried reinstalling. I probably should wipe my system.
     
  6. MacAodh macrumors regular

    Joined:
    Apr 3, 2006
    Location:
    Dublin, Eire
    #6
    My macbook began doing this too for a while. Tried reinstaling and everything and nothing worked... till one day it just worked again... odd
     
  7. SubliminalMac macrumors member

    Joined:
    Aug 25, 2007
    #7
    Memory/CPU usage fixes

    You could try to run a utility that automates your cron scripts, which is what probably happened to make your computer work well again.

    Try running cocktail or something of that nature 2-3 times a week. It will keep your computer working well. Always make a backup as well(time machine) just in case it is an issue that this wont fix, you can restore.
     
  8. PeggyD macrumors 6502a

    Joined:
    Jan 9, 2007
    Location:
    Covington, WA, USA
    #8
    It could be the fan is failing. I just recently had to have the right fan in my 2-year-old MacBook Pro replaced by AppleCare. If you live near an Apple Store, make an appointment with the Genius Bar & have them take a look.
     
  9. Eidorian macrumors Penryn

    Eidorian

    Joined:
    Mar 23, 2005
    Location:
    Indianapolis
    #9
    I don't see any reason to do this.

    Are you running all the application simultaneously?

    YouTube would be Flash, Warcraft would be a game, and NeoOffice would be loading an entire suite of applications.

    This could be possible as well but the user needs to inform more of their CPU usage given their applications.
     

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