Gigabyte Master x570 and x3900 CPU:
For my PBO/PB2 and AutoOC did basically nothing, sometimes a little more or less but no real improvement, dropping the core from Auot to Normal and then adding an offset of -0.050 dropped temps and did nothing either.
What did help was setting everything PB2/PBO/AOC to Auto and bumping the FSB from 100 to 102.5 (need to try more still), simply put let PB2 do what it does and bump everything to basically all core 4150 or 4075 and then add an extra 103.75MHZ to that, or for single core take the max I ever really set of 4350 and add an extra 108.75 to that. so now I'm seeing 4230 or so all core regularly and 4458 single core.
Really sad that I'm back to FSB OC, but at least it works for me.
Note: At 102.5 FSB I'm prime 95 stable for 8 hours using 62GB of 64Gb (3066 CAS16) of RAM, so I'm calling that stable.