https://wccftech.com/msi-agesa-1-2-0-6c-bios-firmware-amd-ryzen-7-5800x3d-cpu-support-performance-improvements/

MSI has just rolled out its first wave of AGESA 1.2.0.6C BIOS firmware for 500-series motherboards and offers support for AMD Ryzen 7 5800X3D CPU.

Recently, motherboard makers started rolling out their respective BIOS firmware for 500-series boards which includes support for AMD Ryzen 7 5800X3D. MSI is the latest motherboard maker offering such support on its X570 & B550 motherboards.