After a long needed hibernation

[PiLsY]

This is superb info mate, have that same board, also overvolts Vdimm. I did find some annoyance related to the VSOC, sometimes undervolting to 0.9v from 1.1v if set at Normal/Auto or undervolting with the offset mode. Problem is that VDDG remains in a fixed value of 0.95v.

Glad that helped, its driven me bloody mad for weeks. Especially as Gigabyte take nearly a week to reply each time its the longest short conversation I've ever had!

To sort out your weird fixed voltages...as you increase memory multiplier the AMD AGESA code automatically changes some settings in the background, you'll find them set to "Manual" under the Settings > CBS section in bios. This is the part that controls AMDs stock boosting features. You can't change these back to Auto when over 3600mhz, itll just switch them back again when you restart, so you're forced to set your manual voltages here.

This is off the top of my head, but should get you pointed in the right direction. In the Tweaking menu I set the memory multiplier and subtimings, vDDR and vTT and vSOC to my values then change every other voltage in here to "Normal" (NOT Auto!!!). Now go exploring the bios settings page and youll find everything you need under the CBS and AMD overclocking menus. AMD Overclocking is supposed to be the master setting, but I set everything in CBS to match the AMD overclocking section anyway. The CBS menu is for controlling stuff while using PBO and staying within AMD spec limits so you cant go over 140A EDC for example. The AMD overclocking menu is where all the full overrides are. I'll screenshot everything in bios and post some sort of guide in the next few days (RL work permitting). This won't be feature complete by any stretch, I've been blue team for the last 15 years and I'm still learning Red stuff but i'll expand it as I go.

I do wonder if all the X570 Gigabyte boards overvolt vDDR like this. If they've taken the lazy route here maybe they have elsewhere. I did ask the question if they can update the Auto vTT algorithm to set 1/2 reported value instead of expected, but I wont find that out for another 3 to 5 days lol.

Also worth mentioning - "Last Known Good Settings" when recovering from a bad boot does not restore any setting behind an "Accept" wall but manually saved bios profiles do, so make sure you save a profile as you work and restore that profile if you get a cmos reset. Last known good is no good at all. This is the same on my MSI B450 and the Gigabyte X570, so its safe to assume this is an AMD thing in general.