I bought E7200 and P5Q-E motherboard and I tried overclocking it a bit... I raised the FSB from 266 to 333 (3.16Ghz on cpu), but I also had to raise the voltage up to 1.25 so that the CPU was prime95 stable but i noticed two things. Prime95 always crashes on the Core#1, #0 works fine even at 1.18V. And the other thing, when idle, Core temp reports temperatures 32°C and 20°C for core#1 and #0. What could be the cause of that difference in temperatures? When both cores are under load the temperature is almost equal max 1° difference. Do I have a bad chip or maybe there is just bad thermal junction between die and heatspreader?

It is an SLAVN, and batch A. VID 1.15V