AMD B550 motherboards with M2 PCIe 4.0 support would launch June 16th
Amazon.com: GIGABYTE B550 UD AC (AM4/ AMD/ B550/ ATX/Dual M.2/ SATA 6Gb/s/USB 3.2 Gen 2/ Intel 802.11a/b/g/n/ac/Realtek GbE LAN/PCIe 4.0/ Motherboard) : Electronics
MSI AMD Ryzen PRO B650M-A WIFI6E AM5 PCIe 4.0 DDR5 MicroATX Motherboard LN129285 | SCAN UK
Amazon.com: INLAND 1TB GEN 4 PCIE 4.0 NVMe M.2 2280 SSD +AMD Ryzen 7 5800X Desktop Processor with ASUS TUF X570-PLUS (WI-FI) PCIe 4.0 ATX Gaming Motherboard Bundle : Electronics
B550 motherboard guide: ASUS and AMD bring PCI Express 4.0 to everyone with ROG Strix, TUF Gaming, and Prime - Edge Up
GIGABYTE B550 AORUS ELITE AX V2 AM4 AMD B550 ATX Motherboard with Dual M.2, SATA 6Gb/s, USB 3.2 Gen 2, 2.4/5 GHz Dual-Band, 2.5 GbE LAN, PCIe 4.0 - Newegg.ca
ASUS Ryzen 7000 PCIe 4.0 Motherboard - Walmart.com
It Matters Where You Shove In That M.2 PCIe SSD - PC Perspective
BIOSTAR Formally Enables PCIe Gen 4 on its AMD 400-series Motherboards | TechPowerUp
Pro WS W680-ACE IPMI|Motherboards|ASUS Global
PCIe 4.0 | Motherboard - GIGABYTE Global
Intel Z490 Motherboards With PCIe 4.0 Ready Slots?! - YouTube
Amazon.in: Buy MSI X570-A PRO RYZEN 9 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
Your Ultimate Guide to Understanding PCIe 4.0
AMD Reveals the X570 Chipset: PCIe 4.0 is Here
PCIe 4.0 Means Motherboard x16 Slots Will Have 16GT/s and 300 Watts At The Slot - Legit Reviews
PCIe 4.0: Everything you need to know, from specs to compatibility to caveats | PCWorld