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    X220t GPU (Video!) throttling

    Discussion in 'Lenovo' started by ThiPaX40, Sep 12, 2011.

  1. ThiPaX40

    ThiPaX40 Notebook Consultant

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    For some reason my X220t does not perform well playing any kind of video on battery power (Video playback or any other profile) On AC it's fluent, on battery power it's sometimes choppy.

    I have tested this with Media player and VLC, with all sorts of video formats. It seems that for some reason the GPU clock does not go up when it needs to(on battery power)

    Both CPU-Z and HWINFO show a consistent 650Mhz no matter what i do with the X220t, the little GPU meter in the Thinkpad Power manager shows 100% all the time..

    Anyone ever seen anything different? Is there a way to force it to 1.3GHz?

    - BIOS 1.21
    - Driver version 8.15.10.2418
     
    ThiPaX40, Sep 12, 2011
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  2. vinuneuro

    vinuneuro Notebook Virtuoso

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    Is video quality set to Optimize Performance for battery power in the Power Manager.
     
    vinuneuro, Sep 12, 2011
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  3. ThiPaX40

    ThiPaX40 Notebook Consultant

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    Yes, it is.. I have have tried all available profiles and even with all the individual settings on max, the GPU shows 650Mhz, on AC or batterypower.

    Main question at this time: Are programs like CPU-Z and HWINFO (or any other program) even capable of reading real-time clocks of the HD3000?
     
    ThiPaX40, Sep 12, 2011
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  4. vinuneuro

    vinuneuro Notebook Virtuoso

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    Yes, Hwinfo can detect gpu speed fine.

    First of all even the most complex 1080p files play fine at 650mhz on battery power (they did even with the old 4500MHD). Only when I apply particularily taxing shaders like denoising in MPC-HC does the gpu need to go above 650mhz. Even with the sharpen complex shaders the gpu doesn't need turbo.

    Looks like video quality settings in Power Manager don't do much. Only the Turbo settings affect whether or not the gpu can go past 650mhz.

    I don't know what to tell you other than to use the latest MPC-HC if you aren't already.
     
    vinuneuro, Sep 12, 2011
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  5. unreal25

    unreal25 Capt. Obvious

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    I'd suggest looking into the Advanced Settings for each of the Power Plans.

    Click on the Battery icon in the TaskBar Tray, then "More Power Options", then "Change Plan Settings", then "Change Advanced Power Settings" for a plan you want to change. Then you can change options like this for both cases when the laptop is running on AC or battery:

    [​IMG]
     
    unreal25, Sep 12, 2011
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