random temp spikes on late 2008 MBP

Discussion in 'MacBook Pro' started by hehe299792458, Jan 16, 2009.

  1. hehe299792458 macrumors 6502a

    hehe299792458

    Joined:
    Dec 13, 2008
    #1
    Hi

    Recently, I noticed rapid and seemingly random temperature spikes in my MBP. For instance, I was just browsing the web a few minutes ago when I noticed it was getting rather hot. I looked at the temp, and the CPU was at 92C already! Usually, the computer idles around 45C (with 9400m graphics), but when the temperature spikes happen, I have to shutdown the computer, wait 10 min, then turn it on to make it "normal". I tried using smcFan to push the fans to max (6200prm) and the temperature would only go down to 75C. Any ideas on what might be causing this?
     
  2. DoFoT9 macrumors P6

    DoFoT9

    Joined:
    Jun 11, 2007
    Location:
    Singapore
    #2
    wow this is very random! i am guessing that there is a random process turning on and chewing up the CPU, and the temperature gets so hot because the fans take a little while to kick in properly.

    i would suggest checking out the processes (using Activity monitor) to see what is chewing up the CPU.
     
  3. hehe299792458 thread starter macrumors 6502a

    hehe299792458

    Joined:
    Dec 13, 2008
    #3
    This happened again today, when I when opened activity monitor and there's nothing out of the ordinary. According to it, the most cpu-intensive program was itself (activity monitor)... followed by Firefox and Entourage.
     
  4. kastenbrust macrumors 68030

    kastenbrust

    Joined:
    Dec 26, 2008
    Location:
    North Korea
    #4
    Does it happen when your viewing Flash video's online, youtube etc, or maybe even random adverts on a page made from Flash that you may not even notice?

    Flash is incredibly resource intensive (CPU) on Macs and probably whats causing your issue. It can be disabled simply in the Firefox settings.
     
  5. hehe299792458 thread starter macrumors 6502a

    hehe299792458

    Joined:
    Dec 13, 2008
    #5
    well, if it were flash adverts or videos, I'd imagine this would happen more often. And besides, Firefox wasn't using that much cpu anyways.
     

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