AMD Ryzen 4000 Zen 3 will be compatible with Socket AM4, but it is end of the road for X470, B450, and below motherboard owners - NotebookCheck.net News
AMD pivots: B450, X470 motherboards will support Ryzen 4000 after all | PCWorld
AMD B550 Coming in June! B450 Board Will Not Support Ryzen 4000 (Zen 3) Processors – goldfries