GIGABYTE AM4 Motherboards: PCIe 4.0 Ready for Ryzen 3000
Msi Pro X670 P Wifi 6e Motherboard + Amd Ryzen 9 7950x Cpu Combo Socket Am5 Support Ddr5 128gb Memory M.2 Pcie 4.0 Mainboard New - Motherboards - AliExpress
AMD Confirms PCIe 4.0 Not Coming to Older Motherboards (X470, X370, B350, A320)
AMD confirms lack of PCIe 4.0 support on older motherboards
AMD Reveals the X570 Chipset: PCIe 4.0 is Here
Mainboards: Formfaktor, PCIe 4.0 und Kauftipps
Amazon.com: MSI MAG B550M Mortar Gaming Motherboard (AMD AM4, DDR4, PCIe 4.0, SATA 6Gb/s, M.2, USB 3.2 Gen 2, HDMI/DP, Micro-ATX, AMD Ryzen 5000 Series Processors) : Electronics