Yes, PBO functions on A520 motherboards and that is why some have been able to get around "no overclocking" barriers by using the BCLK method as that seems to be tied to the PBO feature.
Yes, PBO functions on A520 motherboards and that is why some have been able to get around "no overclocking" barriers by using the BCLK method as that seems to be tied to the PBO feature.
Not being able to manually increase the clock frequency has literally nothing to do with the hardware being able to do it automatically. Like I said, it is a matter of the specific board model in terms of what kind of VRM configuration it has, what the CPU model is and how good the cooling is. And nothing else really.