Sorry for this dumb noob question.

But I have looked at several CPU Temp programs and they all seem to display a Overall CPU Temp that is always about 10-15 degrees lower than the other 4 Core Temps that it they display. For example while running Prime95 I had an Overall (CPUTIN) Temp of 75, but the 4 Core Temps were about 85-89. So, I shut down Prime95.

Why does there always seem to be this temp difference, and which temp should I primarily use as my gauge limit?

Thanks,
Snacko