I'm still running the v17 BIOS on my B450M Mortar, it's totally stable at the moment so don't want to risk the new v19 BIOS bodging it up I'll wait for a few more releases .
My 3600X is totally stock though, PBO doesn't really do anything at all so switched it off, might try PBO Enhanced 4 in the BIOS settings or maybe 100-200Mhz boost on the PBO see if it makes any difference. RAM is also only running at 3200Mhz with the XMP profile I have no idea really how manual RAM overclocking works so hesistant to mess around with it, 3600Mhz is ideal I think? Is my RAM likely to be able to get to 3600Mhz (Vulan T-Force 16GB 3200)?
You're lucky, i cannot get my memory above 2133 without the whole system bricking itself. ive tried XMP and manual timings, it just doesnt care.