I definitely have slightly higher volts in all core load. But still under 1.3I have written time an again in various discussions how to configure the 3900X for light loads. Which means 1-2 cores hit 4600+ (on D15 at least) and the rest on light loads are hovering between 4400-4550. If you try to push CB20 then ofc this is not light load and the CPU will throttle down to reduce power. Why? Because on light loads AMD has said 1.5v is fine, but on heavy loads (all core 100%) anything over 1.27v would damage the worst dies.
Have a look here. I have PBO off as I am using again 1usmus v1.1 these days but have activated XFR and everything else he advices. Also make sure you have uninstalled Ryzen Master from your system and you have flashed the BIOS after you done so.
https://forums.overclockers.co.uk/posts/33266474/
