I'm actually using an Arkua Heat Pipe with is a normal heatsink and fan, but with a radior type of pipe going threw the heat sink. OC'd at 3.36GHz my computer idles at about 49C and my mobo's temp is quit low (25C I beleive). And when I really stress it, it goes to about 55C and 27C. I used to own an OC'd AMD 3000+, so anything lower then 60C looks good to me! lol!