EDIT: I realize overclocking > CPU section would've been more suitable. apologies for the misjudgment
I built my pc 16 months ago. I've always noticed that the cores had quite a difference among them, when I compared to the q6600 temperatures of my friends
Thing is, just yesterday I reapplied Arctic Silver 5, because the first time when I applied it from what I read I went overboard with the quanitity
Even though I can notice a slight decrease in temperature after I reapplied, there still is a nonuniformity between the cores. Just like before there are still two distinct core pairs that have similar temperatures. Rather than all 4.