https://wccftech.com/msi-amd-agesa-1-2-0-7-bios-x370-b350-a320-motherboards-adds-ryzen-7-5800x3d-cpu-support/

MSI has officially rolled out its AMD AGESA 1.2.0.7 BIOS for X370, B350, and A320 motherboards, adding support for Ryzen 7 5800X3D CPUs. The rollout comes a few weeks after MSI brought its 1.2.0.7 BIOS support on the top MEG X570 series motherboards which we reported here.

Press Release: AMD has announced great news about extending the portfolio for system builds. The Ryzen 5000 Series desktop processor will now support the oldest socket AM4 motherboards, which include the X370, B350, and A320 chipset. This substantial improvement offers a seamless way to upgrade to "Zen 3" performance, including the AMD Ryzen™ 7 5800X3D that has ground-breaking AMD 3D V-Cache technology.