The AMD AGESA 188.8.131.52 is pending release to support the new R3 processors. AGESA 184.108.40.206 is expected to be available by May 8, 2020.
MSI was the first to disclose the new BIOS for their B450 series motherboards.
- B450M-A Pro MAX
- B450M Pro-VDH MAX
- B450M Pro-M2 MAX
- B450M Mortar MAX
- B450-A Pro MAX
- B450 Tomahawk MAX
- B450 Gaming Plus MAX
It does appear older boards are not being provided the new BIOS as of now. In time earlier motherboards may see some changes.
Beta testing is looking at the HDMI audio problem. Some improvement with the RAM compatibility problems are also being in the works,