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Laptop fan running at full speed all the time

Discussion in 'Laptops' started by neilsanner, Feb 1, 2006.

  1. neilsanner

    neilsanner Guest


    Since yesterday my laptop fan is constantly running at full speed. Just
    to see if it could be a driver, I've tried to run the computer under
    Windows safe mode and it seemed to help a little bit. The CPU
    temperature is 64 degrees Celcius (147 fahrenheit) and the CPU
    usage/activity is less than three percent.

    Any ideas?
    neilsanner, Feb 1, 2006
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  2. neilsanner

    neilsanner Guest

    Hi think I've just found the answer to his myself.

    Yesterday I went into Power Options Properties and changed the Power
    sheme to Home/Office Desk. I remembered that it was since then that the
    fan was running at full speed all the time. To fix this I put the
    scheme to Portable/Laptop and VoilĂ !!! The fan is back to normal...

    I don't understand though... Why should this make a difference?

    neilsanner, Feb 1, 2006
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  3. Possibly the Home/office setting disables "speed step" (slowing down the
    CPU) and causes the CPU to run at full speed constantly.

    I was going to suggest that your CPU fan/heatsink may be clogged with dust.
    Barry Watzman, Feb 1, 2006
  4. neilsanner

    neilsanner Guest

    You're right:
    "On a default Windows XP installation, the power schemes in the power
    settings of the system panel control the frequencies of the processor."

    They have a nice little app at this website which enables to control
    cpu frequency.

    neilsanner, Feb 1, 2006
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