Just to be sure that I understand it correct - You mean two best cores of each CCD NEGATIVE and all other cores POSITIVE or ?
Thanks
C
Sorry, everything is negative.
So the baseline is that you need to balance the "good cores" and "weaker cores". Weaker get more negative offset, stronger less negative offset, and strongest even less negative offset, since good cores will use that voltage "wisely" to get higher frequencies.
What you also need to understand is that the 2nd CCD, usually is not the same quality as the first, meaning, you can drop more on the 2nd CCD and maybe, the strongest cores on the 2nd CCD need to be more or less leveled with the strong cores offset.
Again, this is a theory. Lots of good people in this forum thought they were stable and out of the blue ... a crash pops