Lupiron :
Sound advice : Tcase to Tjunction Delta shows performance of your cooler. The higher the better.
My TRUE maintains a delta of 16 under load and sometimes 17.
Its never under 16, so when its 15 or 14, I know its not seated right. (As a demonstration for its usefulness.)
And its always been TRUE to its word, hahaha!!
--Lupi. (Just a little.)
Lupi, the point concerning your Tcase to Tjunction Delta is Calibration. Either Tcase is too low, or Tjunction is too high, or both, which is most likely.
Perhaps you might like to read the following Intel 5 page paper, which I consider to be the thermal "Holy Grail" regarding this very topic: Temperature measurement in the Intel Core Duo Processor -
http://eda-publishing.imag.fr/spip/IMG/pdf/TMI23.pdf - I will refrain from explaining the significance of this information at this time.
Also, you might like to read all 31 pages of the following thread over at Xtreme Systems: Real Temp -
http://www.xtremesystems.org/forums/showthread.php?t=179044 - I consider this ongoing research to be the most revealing and provoctive work currently available, although the most relevant posts recur from just a small group of users with inside knowledge.
Lastly, if your CPU and Core temperatures are "canned" values from one of the popular utilities, have you tried following my Temp Guide to Calibrate your rig?
Comp