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.