Trial and Error Method for me most of times
🙂Your PC History was fun to read and did bring back some memories. Good and bad
🙂 Your idle voltages are rather very low o be honest.
Did you make the pics with only 16 Gig installed?
I would think, that 64 Gig would need 1.2 -1.35 on both....
Try 1.2 to start with fully kitted with 64 Gb .
Put a little difference in power between both .
Some write that the HW likes it.
I rather think your throtteling may even have something todo with not enough power.
I would even be more convinced of this if your idle power states mentioned would have been made with 64 Gig intsalled.
Rgds
Carlyle
The Asus Guru himself has sage advice and the graph i mentioned in the first post:
https://edgeup.asus.com/2017/kaby-lake-overclocking-guide/3/