Alleged ASUS X470/B450 PCIe 4.0 Compatibility Table Paints A Confused Picture
Gigabyte X570 AORUS Elite WiFi Motherboard with 12+2 Phase Digital VRM with DrMOS, Advanced Thermal Design with Enlarge Heatsink, Dual PCIe 4.0 M.2 with Single Therma Guard. - Walmart.com
Gigabyte's latest BIOS update enables PCIe 4.0 support on its AMD X470 and B450 motherboards - NotebookCheck.net News