B550 motherboard guide: ASUS and AMD bring PCI Express 4.0 to everyone with ROG Strix, TUF Gaming, and Prime - Edge Up
PCI Express 3.0 vs. 4.0: Does it improve gaming performance?
ASRock > B550 Phantom Gaming 4
Amazon.in: Buy MSI X570-A PRO Motherboard (AMD AM4, DDR4, PCIe 4.0, SATA 6Gb/s, M.2, USB 3.2 Gen 2, HDMI, ATX) Online at Low Prices in India | MSI Reviews & Ratings
AMD Ryzen Threadripper PRO Leaked Final Specifications Indicate Double PCIe 4.0 Lanes, 2TB RAM Support, And PRO Features - Appuals.com