MSI B550M-A PRO AMD Socket AM4 Amd Motherboard/ support 3rd Gen AMD Ryzen™ Desktop Processors and AMD Ryzen™4000 G-Series Desktop Processors ( Not compatible with AMD RYZEN 5 3400g and AMD RYZEN
AMD Ryzen 5 3400G and Ryzen 3 3200G spotted in SiSoftware database along with the B550 chipset - NotebookCheck.net News
MSI PRO B550 -A PRO AM4 ATX AMD Motherboard B550 4400+ MHz OC RAM 128GB Support SATA 6Gb/s 2x M.2 slots Copper PCB (Not Compatible With AMD 3400G & 3200G + SATA