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    Undervolting GPU

    Discussion in 'Hardware Components and Aftermarket Upgrades' started by petar_b, Sep 20, 2009.

  1. petar_b

    petar_b Notebook Enthusiast

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    Anyone has a utility to undervolt and underclock ATI and NV mobile cards ?
     
    petar_b, Sep 20, 2009
    #1
  2. sgogeta4

    sgogeta4 Notebook Nobel Laureate

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    It's riskier than undervolting the CPU and yields less results, hence why people don't generally do it. Search the forum for older threads on it.
     
    sgogeta4, Sep 20, 2009
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  3. Trottel

    Trottel Notebook Virtuoso

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    It may or may not be possible via software based on the video card's voltage controller.
     
    Trottel, Sep 21, 2009
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  4. SoundOf1HandClapping

    SoundOf1HandClapping Was once a Forge

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    But if you're interested in doing so, GPU-Z can extract your vBIOS, and NiBitTor will edit nVidia GPU BIOSes.

    What kind of GPU?
     
    SoundOf1HandClapping, Sep 21, 2009
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  5. naton

    naton Notebook Virtuoso

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    I tested nibitor on a Geforce GO 6800, and I couldn't undervolt. I'm not saying that nibitor doesn't work. All I'm saying that Mobile GPUs are designed/selected to use the lowest voltage possible. Hence, they are unlikely to undervolt any lower than their default/factory set voltage.

    In some case even overvolting is a problem, and sometimes the only way to do it is via hardware modding.

    Have you tried to improve your colling system by using better thermal compound such as AS5...
     
    naton, Sep 21, 2009
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  6. petar_b

    petar_b Notebook Enthusiast

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    It's ATI 4670 that runs bit too hot and I plan to put new compound.

    However I have great results with undervolting CPU, so I thought I could do the same with GPU.

    I mean, these GPU have high working temp when doing graphic tasks, cca 100 C... That's way too much for notebook. I have seen Radeon BIOS Editor, but would like to test settings before flashing them back.
     
    petar_b, Sep 21, 2009
    #6
  7. Kallogan

    Kallogan Notebook Deity

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    A good old undervolting is more worthy than all the best paste compounds of the world ;-).

    From what i gathered, Ati's gpus don't handle undervolting as well as nvidia's ones.

    Especially a 4670 which is already an overclocked 4650. I mean, the guy on this thread manage to undervolt his 4650 to 1V from 1,1V but i don't know if a 4670 would handle this. You should look at this thread :

    http://forum.notebookreview.com/showthread.php?t=399430

    What are the voltages available in the radeon bios editor for your gpu ?
     
    Kallogan, Sep 21, 2009
    #7