So I have done about 9-12 hours extensive testings.
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You WILL have to know your max PPT, TDC, EDC else this is just waste of time doing it and you will just be using default values which give you more aggressive under-volt than you might had opted before manually before using this.
Make sure to set those values in bios before moving on else you will just see default values in there no matter if you pick auto oc, or pbo, this was the case at least for me it would not pickup anything else than default values in software until manually set in bios.
So go to bios set values for those and set everything else on auto in PBO menu.
Verify and run a test just to verify settings are applied like on this screenshot, you don't have to run a full test if your settings where not added correct, go back and do it again.
My 5900X can handle these
PPT 185
TDC 125
EDC 170
Screen after completion..
https://i.imgur.com/otgetEQ.png
Video running test being stable for now and screen from HWiNFO just after finished tests.
Setup
5900X B0 Stepping early unit, not first week tho.
Asus x570-I ITX - Bios 4204 with AMD AM4 AGESA V2 PI 1.2.0.6b
3080 FE
16GB F4-3600C15-8GTZ
SF600
All in a loque ghost s1 case with some vector EK cooling setup on all parts.
All this was done by upgrading to latest bios, resetting bios to make sure no old values was stock and I only touched RAM timings with and dram voltage and PPT, TDC, EDC, PBO scalar x10, overclock 200mhz, rest was injected by ryzen masters into the bios settings after hitting apply.
Overall AMD have done a amazing job with this, even noobs can overclock and undervolt proper now 10/10 AMD clap clap
Do you wish to do it your self grab latest version here
https://www.amd.com/en/technologies/ryzen-master
My 5800x is so crap it bootlooped with whatever new RM injected into the BIOS. It even reset the computer while just browsing after I increased the CO values a touch.
New RM were suggesting between -12 to -23 for most of my cores, and I'm beginning to suspect my best cores can't handle the undervolting. I've now put -15 for all cores except for my best two (left them alone) and it seems to be ok after a couple hours of Elden ring and browsing.
I ran a percore and it just set every core to -30 for my 5800X which it can't do as it just bluescreened within 15min of using Chrome.
AMD should post a video guide with best practices on how to use this feature.
I find it really odd that they just dropped a major feature like this without any proper explanation.