the best idling program for amd would be vcool
http://vcool.occludo.net/
its FREE
does several other things... even will FORCE your cpu to idle if it is running to hot.. and will shut it down if it doesnt
you will probably have weird issues when running it as is.. so play with the options check boxes till it works right.
(ex: master read caching had to be enabled for me, or my sound would get funky and lock my computer)
but i love vcool