Yes the Prime B350M-A/CSM. It has dram voltage. I am running it now at 3333 14-13-13 with ~ 1.4v on latest 0902. Ram is gskill 3600 cl15 kit, F4-3600C15D-16GTZ.

Your Ryzen CPU natively supports JEDEC DDR4-2666.

DDR4-3333-14-13-13 at 1.4V is very good (and surprising on that non-ROG mobo).

I doubt you could ever get full G.Skill-rated DDR4-3600-15-15-15 performance, even with just two 8GB sticks, even with its 1.2V base.

Watercooled ... so you replaced the G.Skill heatspreaders with EK Monarchs or something?

I don't understand what feature you're requesting in this thread, lol. You can already adjust DRAM voltage? You've already exceeded maximum ASUS-rated performance threshold? You're asking ASUS to increase motherboard DRAM performance because your particular DRAM can support faster performance? On a PRIME mobo, not a ROG/EXTREME mobo?

Some motherboards have two options for dram voltage.. dram voltage and dram boot voltage. This is why. I guess before post, training, too much voltage can be a bad thing and you cannot post at all.

For instance, my ram may not post over ~1.45v. Same settings but lower voltage of ~1.4v it will post, but it is not stable in windows. I've come to this conclusion by trial and error. Adding more voltage decreases errors during testing, but then at a certain point it fails to post. That doesn't make sense. And like I said, others that have this option have confirmed the issue.

1.5v isn't a lot for b-die. For the daily user at 3000 it is, but people have pushed WAY more voltage through b-die and on air cooling. Even the newer 4000+ sets have a factory voltage of 1.45v. Yeah they have ek monarchs on them. Not very functional. I had the parts left over from a hardline x99 build so I figured why not. VRM is also watercooled on my board.