BIOSTAR has recently added BETA BIOS online on their official website to support both the 5000 and 4000 Series AMD CPUs and APUs on the BIOSTAR A320MH motherboard. AMD has previously mentioned that these new CPUs shall not be supported on the A320 chipset, but it seems the manufacturer is creating a workarounds to better support AMD’s range of processors.
However, it has been noted that if the latest BIOS version (220.127.116.11C) is used, the motherboard will not support the Bristol Ridge lineup of AMD CPUs.
You can download the BIOS here https://www.biostar.com.tw/app/en/mb/introduction.php?S_ID=912#download
Specifically, added into the CPU Support lists with the latest CPUs are
- Ryzen 9 5950X
- Ryzen 9 5900X
- Ryzen 5 5600X
- Ryzen 7 PRO 4750G
- Ryzen 5 PRO 4650G
- Ryzen 3 PRO 4350G