Originally Posted by Cyro999
4.7ghz is easy mode for Kaby, though, and that was your
of the original skylake
Yes, but assuming a general mean 300MHz advantage at identical voltage between SKL and KL at a 1:1 core count, I think it's reasonable to suggest that adding two cores will alter the power requirements and thus the thermal properties of the six-core chips. I'm not discounting that 14nm++ will be another step forward for Intel, I'm only theorising that these advances will largely be expended in adding additional cores to the package.
Simply put, 14nm to 14nm+ allowed for higher clocks at a given voltage with identical core counts. The 7800X doesn't allow for a great comparison, because it's using a distinctly different mesh design, but that's still six cores on 14nm+. Assuming that 14nm++ improves the thermal and power situation considerably to a best case, we're still likely left with a part that performs thermally like a quad-core KL. Six cores at 5GHz on good cooling isn't anything to sneeze at. I'm just advising people not to count on 5.2GHz AIO overclocks on these chips.