The way I'm getting monster performance out of my 3900x:
I'm setting the RAM entirely manually starting with the DRAM calculator and using the Hynix CJR memory type, even though the new hynix chips on my kit aren't technically supported by the calculator yet. This is the RAM kit I'm using:
Set the DRAM calculator to 3733 or 3800 and use the timings it comes up with at that speed. Tweak from there once everything else is stable.
You WILL need to use taiphoon burner to properly pull the RAM info. You can NOT just click the read XMP button in the DRAM calculator. It doesn't work that way. You import the info from taiphoon then click "safe." That will get you the correct timings.
Now the rest of the story:
DOCP is OFF. That's right, OFF. It works pretty well on or off, but when I was making my last push to get 1900 FCLK stable, the more of ASUS automatic crap I could turn off, the better.
I don't use "AMD Overclocking" at all. Never even enabled the menu.
I use a negative voltage offset somewhere between .075 and .1
RAM voltage between 1.35 and 1.39.
Digi VRM, I do have the power targets bumped up a little (not huge) so it won't quite limit under a Prime 95 blend run.
RAM Read is over 58000. I can easily break 59000 but traded timings for lower latency for gaming.
RAM Latency 59.7 to 59.9.
CPUz single thread bench: Over 530.
My CPU's boosts aren't anything special and I let the chip handle itself on that. When all cores are loaded really hard around 4075mhz. I do see single cores bump to 4.45 occasionally. But with such a high FCLK and low RAM latency worrying about the last 100mhz on the CPU (which is nearly impossible to control on these new Ryzens) isn't worth the hassle. It's already destroying the 9900k almost everywhere.
Temps are fantastic. Prime 95 blend on my Noctua D15S topping out about 70C. Everything else is at or under that obviously.
So there's no confusion, my system is now 24/7 stable for all use. I hammered it for many hours the last fews nights playing RDR2 no crashes at all. No concerns leaving it just like this forever now.
All drives are NVME.
Power supply is a Seasonic 850 Titanium.
Video card is a lower end Gigabyte RTX 2080 with custom flashed BIOS.