I´ve just upgraded to W7 64, from WinXP SP3, and was surprised that Cool n´quiet doesn´t work at all (as opposed to WinXP 32). AMD claims that w7 has native support to it: you have only to enable it in bios, and set Power saver, in Power Options, but no sucess here. Seems to me, it´s a driver issue, although I have tried every one in AMD support page.
So, any help will be well come.
My setup: Athlon 64 3200+ (Venice)/ Asus A8V-X (last bios update)/ 2 GB DDR400/ Radeon HD 3850 agp