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Voltage control via software

Discussion in 'ATITool' started by pumpkin0, Jul 8, 2006.

  1. pumpkin0 New Member

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    Hello,

    I´m trying to find out which (older) ati-radeons can be voltage moded via software. Powerplay seems to be the key, as it can lower the voltages under windows. Is the protocoll used for this already documented ?

    Hint: i don´t want to overclock/volt. I want to underclock/volt a old/ancient radeon (which cannot cope with recent games anyway) for a slient notebook. Currently it´s a radeon 7500 inside a R51.

    I guess the developers of tools like ATItool use Powerplay/the driver to find the right IO-ports for changing the frequencies. So voltage modding should just be another port... That´s why i´m posting here.

    Thanks.
     
  2. DRDNA

    DRDNA

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    only th x1xxx series has software voltage control in the ati line.
     
  3. pumpkin0 New Member

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    The 7500 (codenamed M7) can change the voltage via powerplay:
    http://www.ati.com/products/MobilityRadeon7500/features.html
    The rest (M 8500, 9xxx and up) should be able to do the same trick. But nobody in the 3´rd party tool world seems to use it. My guess: so far nobody hacked that part of powerplay....

    And my 2. question: how did poeple hack the change-the-frequency IO-ports ? Are there any tools to do it ?

    Thanks
     

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