ASUS: Some X470 and B450 motherboards will support PCIe 4.0 interface - HardwarEsfera
Enabling PCIe 4.0 on a B450 Motherboard? - YouTube
Ryzen 3000: Asus unlocks PCIe 4.0 on X470 and B450 motherboards | PC Builder's Club
B450 pcie 4 support - CPUs, Motherboards, and Memory - Linus Tech Tips
Amazon.com: ASUS ROG Strix B450-F Gaming II AMD AM4 (Ryzen 5000, 3rd Gen Ryzen ATX Gaming Motherboard (8+4 Power Stages, HDMI 2.0b/DP,2 x PCIe 3.0 x16, USB 3.2 Gen 2 Type-C, BIOS
ASRock > B450 Steel Legend
Alleged ASUS X470/B450 PCIe 4.0 Compatibility Table Paints A Confused Picture
Amazon.com: ASUS ROG Strix B450-F Gaming II AMD AM4 (Ryzen 5000, 3rd Gen Ryzen ATX Gaming Motherboard (8+4 Power Stages, HDMI 2.0b/DP,2 x PCIe 3.0 x16, USB 3.2 Gen 2 Type-C, BIOS
B450M DS3H (rev. 1.x) Key Features | Motherboard - GIGABYTE Global
ASUS Begins Enabling Limited PCIe Gen 4.0 on AMD 400-series Chipset Motherboards | TechPowerUp
Did Asus enable pcie 4.0 on B450 motherboards, again ? : r/Amd