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Notebook CPU Throttling

Discussion in 'General Hardware' started by Swamp Monster, May 6, 2011.

  1. Swamp Monster

    Swamp Monster

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    Hi, my friend here has a Toshiba A300 laptop with:
    Core 2 duo T5800 processor
    3GB DDR2 RAM
    HD 3470
    320GB HDD
    and recently we found out that it has become very slow. On idle CPU is sometimes about 80% loaded and if we try to load it and play some games, it restarts.
    Then I checked Themperatures and it shows about 70°c idle and 85°c after being loaded. And it seems that Temperature sensor stucks at about 85°c, also it sometimes shows -40°c.
    CPU-Z shows default (2Ghz) at first, but if we stress CPU, then as themperature rises it lowers frequency accordingly. It's 2Ghz, then 700 Mhz, then 400 Mhz, an if it reaches about 83°c, then it runs on 199 Mhz.

    So what should I do, what's wrong with it? Windows Power plan is set to high performance and everything is set to max frequency.
    Before it started, we made trip by plane, maybe they played football with this laptop and CPU cooler fell off or something similar? We can open it and try to check thermal compound, but first I want to hear what do you think, thanks in advance!

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  2. cheesy999

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    change the thermal compound, and hoover out the dust - 2 best things you can do to a laptop when the warranty wears off
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  3. Suhidu

    Suhidu

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    Do the high temps seem real?(i.e., hot, loud laptop) Have you blown out dust?
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  4. Swamp Monster

    Swamp Monster

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    Yes, laptop is hot as hell and stinks as burn't plastic. We haven't opened it yet, but will do that soon, thanks for replies!
    Last edited: May 6, 2011
  5. Swamp Monster

    Swamp Monster

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    It's working fine, CPU is cool now. Dust was blocking airflow, see picture. I used the same old thermal compound, but will change it tomorrow when I get new one.

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  6. cheesy999

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    bad thing to do unless it was liquid when you put the cpu on, otherwise it won't form a good bond, see if you can fit a dust filter in there or something if the problems that bad
  7. Swamp Monster

    Swamp Monster

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    I heated it over owen to get it melted and in liquid form. I know it's bad, but it's night now and I'm in foreign city, and we all know that I'm addicted to PC :)
  8. Suhidu

    Suhidu

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    I have an HP dv7 laptop (specs under username) which was overheating any time the GPU was used for anything significant, eventually shutting down on its own. Also, it started doing this after only about a year of ownership. I didn't open mine though, I just blew out the fan & exposed heatsink with compressed air, which fixed it! I think I've blown it out one time since, as precaution.

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