I use old school bios only, no RM.
Think this is how the pbo settings works.
Pbo - got 3 values, ppt, edc and tdc. These just unlock the thermal and current values the mobo provide to cpu. Cpu itself have own safety limit that no way bios can bypass. So its ok max the 3 limit. Cpu internal safety limit seem to be 185w. Maybe zen3 can accept higher next time
Scalar 1-10X- auto increase vcore, even using 10x, only increase abit only, eg. I saw 1.32v become 1.38v. Cpu use different vcore bands depending on apps. The 1.32v is during certain p95 section. This is like Intel adaptive vcore, that adds offset only when turbo boosting
Autooc - mobo tries to tell cpu to upclock by up to 200mhz with unlock limits. Will depend on silicon quality, but mostly for show only with current 7nm zen2.
With my gigabyte master f11, maxing pbo+scalar+autooc do consistently help increase scores around 2%.
Think there is EDC bug with agesa1.4, if don't put as 0, vcore will not increase and cpu ppt won't reach 185w.
I think you can monitor the cpu ppt values on hwinfo. With pbo set to max, i got 185w top and core temps spike to 90c during section of p95.
Core temp seem dependent on how much watt cpu ppt is loading at.
Also cpuz stress test quickly load the temps to 90c too. Seems like a power virus.