Cool! Nice to know. I will try it.
Just for the record, I've created an "underclock profile" just to keep my board cool / silent when I am NOT gaming and it is AWESOME. Totally silent and the power consumption drops A LOT! Here it is: 825mv / 405MHz Core / 810MHz Shader / 920MHz Memory / 30% Cooler.
The card will underclock itself when you don't do anything, all I would do now is just create a custom fan profile.