CPU constantly throttled to 664.87MHz?

Discussion in 'EP121 Slate' started by Marty, Apr 2, 2011.

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  1. Marty

    Marty Pen Pro - Senior Member Senior Member

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    As the title says, my EP121 will constantly throttle itself to about a third of it's max speed. Using CoreTemp I see that the CPU stays at speed a x5 multiplier of it's base frequency (664.87 MHz = 132.97 x 5).

    This remains the case regardless of what Windows power profile I choose, or minimum CPU % I set in the power profile settings.

    Plugging/unplugging from AC power does not seem to change this behavior.

    Running CPU intensive applications like Civ5 (or other games) does not cause the CPU to scale up.

    I've tried using CPUgenie to force the throttle to a certain level, but for some reason I can't enable the throttling feature inside the application.

    The only time I have noticed that the CPU clocks up reliably is right after waking from sleep, but that only lasts about 10-15 seconds before the CPU clocks down again.

    Can anyone tell me how to control the CPU clock speed? Any assistance would be greatly appreciated.
     
  2. JackBFlippinNimble

    JackBFlippinNimble Scribbler - Standard Member

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    I use Throttlestop.
     
  3. Marty

    Marty Pen Pro - Senior Member Senior Member

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    Thank you jack! That little utility was exactly what I was looking for.

    I am just curious though, is anyone experiencing the over-aggressive throttling policy that I described? Or is my unit defective?

    Just a side note, I am running the latest 401 bios. On the bios notes, it said it had an "updated thermal policy". Perhaps that is the cause?
     
  4. CerN

    CerN Pen Pal - Newbie

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    I'm experiencing this as well. It goes up sometimes, but rarely.
     
  5. CerN

    CerN Pen Pal - Newbie

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    Edit: Can't get that program to work:s
     
  6. BenjaminRies

    BenjaminRies Scribbler - Standard Member

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    Mine isn't doing this, but I'm running the 501 stock BIOS
     
  7. krfighter

    krfighter Scribbler - Standard Member

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    Just came here to create precisely the same post.
    Having exactly the same issue. Tried different drivers and did a clean install. If I turn off the Slate for 5 min, it gets back to normal.

    @BenjaminRies: is there a way you can share your bios file?
     
  8. CF77

    CF77 Love Tablet. Senior Member

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    A member posted his 501 bio file in a link somewhere in this forum. I think it is megafile server.
     
  9. krfighter

    krfighter Scribbler - Standard Member

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    for some reason search does not reveal it. do you have it somewhere handy?
     
  10. CF77

    CF77 Love Tablet. Senior Member

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    I think it was Kneebuster post.
     
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