AMD Brings Official Ryzen 5000 Support to 300-series Chipset Motherboards Circa 2016 | TechPowerUp
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
Socket AM4 – Compatibility – Streacom
AMD AM5 socket confirmed to be LGA and is backward compatible with AM4 coolers