That was with Asus PC Probe.
With PC Probe II, on a A64 X2 3600+ 1.9Ghz AM2 with stock hsf but with AS Ceramique it idles at 31C (25C ambient room temp) and under full load on both cores with SuperPi it climbs to 46C.
Interesting note, when I put that X2 system together I knew it wouldn't ever be pushed hard so I thought the stock thermal material would be sufficient. I placed it on without much of a problem, the heatsink did shift a bit as I was trying to get it latched down but nothing bad. During the Vista install at the first reboot I entered the BIOS to make sure it wasn't going to try and boot off the DVD again and while in there the CPU was at 63C. So I got out of there and powered off and cleaned that crap off and put some Ceramique on it and had a huge drop in temps obviously.
When I took the stock off there were no obvious 'flaws' in the paste, so I have no idea wtf was wrong.
On a side note I like Ceramique much better than AS 5.