Amazon.com: ASUS AMD AM4 Pro WS X570-Ace ATX Workstation Motherboard with 3 PCIe 4.0 X16, Dual Realtek and Intel Gigabit LAN, DDR4 ECC Memory Support, Dual M.2, U.2, and Control Center :
M.2 & PCIe Lane Configurations for B550 Unify / Unify-X
Difference Between PCI Express Gen 1, Gen 2, Gen 3, & Gen 4 – DESKDECODE.COM
PCIe (Peripheral Component Interconnect Express) | On the Motherboard | Pearson IT Certification