I ran Prime95 with Cool Temp and AI Suite to check the temp of my Phenom II X4 955 B.E., (C3, stock heatsink, arctic silver 5 thermal grease).
The difference in temp between Cool Temp and AI is up to about ten degrees C! Cool Temp showed the temp under 100% load at 60C, and AI showed 49C. But at idle, or at typical load the temp difference is give or take two or three degrees (sometimes CoolTemp is higher by a few, sometimes AI is higher by a few - but always around 41 idle)
This is my first build, so if there's a simple explanation for the difference I apologize for my ignorance. I'd just like to accurately gauge the stability of my system, and it's confusing me when AI and CoolTemp are telling me two totally different things.