I've just experienced my first fright with my little poor ryzen
I was back to my 3.9Ghz using PState 0 at +0.19875v, and then decided it was time to play with memory... so I went back to BIOS I go for the DOCP profile 5: 3200Mhz.
I set memory voltage to 1.35v as specified by my kit, and save and reset...
I was really thinking, c'mon this a new bios 0083 and my good ryzen is going to be good guy today
But that's not how it wanted to play it.
The next boot failed 3 time in a row, and on the 3rd time went into the bios.
Then I've seen Core Voltage at 1.55V, and I've quickly plugged DMM to see it was going up to 1.573V !!!
I've checked the CPU Core voltage settings, and I could see it on auto but with CPU Core Voltage Offset of 0.2000v.
I've changed it back to 0.19875v (what I've configured previously), and then save and exit (keeping the DMM plugged to make sure it wouldn't go crazy with volts?).
System rebooted and went with a 54 error code with volts at 1.18v on DMM
I've rebooted the system again (keep power button pressed for 10sec, and then turn on again) and system started and shown message: "Overclocking failed".
I went back into BIOS and all settings look like default, so I though that ok, I can just reboot.
So I've rebooted keeping DMM on, and then seen the VCore going at 1.547v again
Shutdown computer -> pressed clear CMOS -> restarted -> all back to normal, and now I'll play with memory only, going one step at a time
Lesson learned, always keep DMM plugged in after changing BIOS settings