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    T420 i5-2410 cpu speed issue

    Discussion in 'Lenovo' started by Colpolite, Jun 23, 2011.

  1. Colpolite

    Colpolite Notebook Deity

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    Hey Fellas, why is my T420 with the I5-2410 mhz clockspeed @ only 797mhz and it never goes up to its max speed and turbo boost speed. The multiplier is suppose to be at x23 @ 2.3ghz, but it is stuck at x8 797mhz

    Checked w/ both cpu-z and hwinfo32 and the clock speed is just stuck @ 797mhz.

    I have it on Max Performance and Min/Max CPU @ 100% and the clock speed issue remains even before and after windows updates.
     
    Colpolite, Jun 23, 2011
    #1
  2. John Ratsey

    John Ratsey Moderately inquisitive Super Moderator

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    1. Did you, by chance, remove the battery? If so, the BIOS will lock the CPU speed to the minimum.

    2. Try running a benchmark such as wPrime and see if the CPU speed increases.

    John
     
    John Ratsey, Jun 23, 2011
    #2
  3. unclewebb

    unclewebb ThrottleStop Author

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    This is a common problem on a variety of laptops.

    Try using ThrottleStop and it will likely fix this problem.
     
    unclewebb, Jun 24, 2011
    #3
  4. EZjijy

    EZjijy Notebook Geek

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    Have you checked what plan you are on in Lenovo's power manager? If you go by power source optimized or battery life, it won't let the cpu go over 800. I would advise you create your own plan to fit your needs.
     
    EZjijy, Jun 24, 2011
    #4
  5. John Ratsey

    John Ratsey Moderately inquisitive Super Moderator

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    Power Source Optimized allows full speed when running on AC. It's my normal profile.

    John
     
    John Ratsey, Jun 25, 2011
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  6. EZjijy

    EZjijy Notebook Geek

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    He never clarified whether he had this problem with the AC on or off. I was assuming he may not have had the AC on and looked at the clock rate.
     
    EZjijy, Jun 25, 2011
    #6