Asus publishes X470 and B450 PCIe Gen 4 compatibility chart - Mainboard - News - HEXUS.net
MSI B550 GAMING PLUS (Socket AM4) USB-C Gen 2 AMD ATX GAMING Motherboard PCIE Gen 4 Black B550GPLUS - Best Buy
Amazon.com: H61M Motherboard, 1155 Pin DDR3 Dual Channel Quad Core VGA HDMI Stable Power Computer Motherboard High Compatibility for Core I7 / I5 / I3 /Pentium/Celeron LGA1155 : Electronics
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
Windows 11 Motherboard Compatibility List - PC Guide
memory - RAM and Motherboard compatibility - Super User