5900X undervolt curve

[therealdippy]

I while back I went through the undervolt process using Cinebench and tuned a set of PPT/EDC/TDC values I liked with what I thought were some pretty good undervolt values: -20 on the fastest 2 cores, -25 on the next fastest 2 cores and -30 on the rest. Some time later after a game crash I discovered WHEA errors which indicated that the 2nd fastest cores had caused it so I increased the undervolting for those 2 cores by 1 notch to -24. A month or 2 later after gaming with no problems, I thought that since I seemed to have found the limit for those 2nd fastest cores and the slowest cores were already at the lowest -30, maybe I should try to find the limit for the fastest cores. So I have been reducing them by a notch every so often. Now I have reached -24, the same as the 2nd fastest cores, and seemingly no problems.

My question is, since I have "proved" that the limit for the 2nd fastest cores is -24, should I assume that the fastest cores shouldn't be undervolted any further? It would seem strange to be able to undervolt the fastest cores by more than the 2nd fastest.