Surely you can turn the fan off on the gfx gard if you are not running 3d apps? Can u do that in atitool?
There is no actual option to do that (as far as i have seen) but you can set the % speed of the fan. So when you're just in windows you could set it to a fixed percentage (ie 30%), then when you are gaming etc, set it to not let the remp go above a certain temperature.
Bit of messing about but good for stopping the noise from the card.