As for the stepping I don't remember off hand I'll have to look at it, but I got it from Nate, its his, so I'm sure he knows whats where.
How I got the temps is the average of the 4 cores across 3 runs. To get my OC I change two settings, the host clock to 175 and the CPU voltage to 1.25v. In both cases OC'd and not OC'd "turbo" option is disabled, and HT is on.
To load the cores I use Prime95 64bit and run the blended test for 30mins, record all the temps with Coretemp.
There are couple things that will affect cooling numbers, main one being the thermal paste properly cured AS5 will be better on the high end then the ceramique we use for the testing. We use the ceramique due to it not having a cure time, if I had to wait 200hrs for AS5 to cure
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this is why we compare back to stock so there is a common base point for comparing.
From there what affects temps is case, what else is in it, its venting, room temp, yada yada...