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    If your thinkpad has high pitch noise, here is a simple fix

    Discussion in 'Lenovo' started by yun, Aug 28, 2009.

  1. yun

    yun Notebook Deity

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    Press F12 when boot up

    choose config

    disable CPU power management

    Maybe lose some battery life.

    I also found the slim/low voltage INTEL CPU has louder high pitch noise. Like X300/X301/T400S
     
  2. ystava

    ystava Notebook Enthusiast

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    Which processor/machine?
     
  3. namaiki

    namaiki "basically rocks" Super Moderator

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    Approx. how much battery life will you lose? Also, if that is the equivalent of disabling Speedstep, is the CPU still able to run at it's highest frequency?
     
  4. yun

    yun Notebook Deity

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    I'm not quite sure the speedstep.

    In thinkpad's bios, it calls CPU power management.
     
  5. Stevenbrouwer

    Stevenbrouwer Notebook Enthusiast

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    It's F1 and not F12 btw. But very nice solution!!! It really works I had a terrible noise (when not connected to a adapter) before but now it's gone..
     
  6. QualitySeeker

    QualitySeeker Notebook Consultant

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    Yeah, what a great fix! :rolleyes:

    A real fix would be to to beat the living daylights out of Intel and AMD for not giving a damn about it.



    [Just to be on the safe side: this is no incitement. Really.]
     
  7. jcvjcvjcvjcv

    jcvjcvjcvjcv Notebook Evangelist

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    It's replacing a problem with another problem. Much like what government generally does.
     
  8. Esben84

    Esben84 Notebook Guru

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    The cause of the high pitched noise is the CPU changing to C4 mode, which is where a big part of the CPU is powered down. This is different from SpeedStep, which dynamically changes CPU clock frequency. You could also attach a USB device to avoid the CPU entering C4 mode.