I'm currently O/C a old computer running on P5B dlx w/ E6400 @ 2.1GHz.
CPU T(C) is turning around 35C (it's 33.5C actually). As you can see everything look right and rdy for O/C process but there's a case name "GC Cart" indicating 87C.
I bet it's the NB, he was kinda hot last time I checked when I was changing the thermal compound (it was really dark and T of CPU was really HIGH [75C]).
I'm really pleased by the results - I just cleaned my graphic card (wasn't that dusty) and the temperature dropped to 53-55C idle (I also increased fans speed). I also comprimed all the cables, so the airflow is better. Whatever, thank for your help.