I have just built a rig with Ryzen 5 3600 with B450 Strix-F. On latest bios 2605 (Aegesa 1003 ab). All core boost clock (PBO + auto overclocking) is only 3950Mhz during CPU-Z stress test and Aida64 stability test. single core boost also never goes beyond 4100Mhz. However i can manual overclock to all core boost clock of 4200MHz with voltage of 1.4V, Aida64 stable for 30min.

I am using 360mm AIO and my CPU temp is good. Max load while on PBO + auto overclocking was only 72C. Hence the PBO is definitely not limited by the temp.

Any sifu here can confirm whether PBO is broken for B450 chipset with latest microcode?

Auto OC yielded same result for me. So gonna stick to manual overclock at this stage

Gonna try to downgrade to previous bios with aegesa 1002. I heard PBO is better on that version

This post has been edited by hypermax: Aug 20 2019, 06:31 PM