I have a brand new laptop with an i7 2630QM CPU. Core #3 (Out of 1-4) always has a temperature 3-8C cooler than the other cores under normal operation. If I put 100% load on the core then it'll go up to the same temperatures as the other cores. Loading a different CPU core results in a 10C difference.
It seems to me that the temperature sensor for that core is off. Considering how small the CPU is, I seriously doubt that core #3 could have better cooling.
Should I be worried about the fact that one of the temperature sensors is inaccurate? (assuming it is inaccurate?)