hnmn i dont know.. i use core Temp.
and just to check real temp i used my system for almost 2 hours... playing games and all. and then shut down.. removed my heatsink... all took hardly 3-4 mins.... and i could touch my proc... it wasnt cool at all.... but little warm... nothing hot @ not to touch level. so i guess i wont go into much details...
let me stay happy with temp i have