Some ASUS X470 and B450 Motherboards Support PCIe 4.0 | eTeknix
Z490 Motherboards PCIe Gen 4 Support Detailed: MSI, Gigabyte & ASRock Lead While ASUS Falls Behind
GIGABYTE AM4 Motherboards: PCIe 4.0 Ready for Ryzen 3000
Combination AMD Milan EPYC 7413 +ASUS KRPA-U16 Motherboard with PCIE 4.0,M.2 | eBay
Amazon.com: MSI X570-A PRO Motherboard (AMD AM4, DDR4, PCIe 4.0, SATA 6Gb/s, M.2, USB 3.2 Gen 2, HDMI, ATX) : Electronics
ASUS Prime B550M-A/CSM AMD AM4 (3rd Gen Ryzen) microATX Commercial Motherboard (PCIe 4.0, ECC Memory, 1Gb LAN, HDMI 2.1/D-Sub, 4K@60HZ, TPM, ASUS Control Center Express) - Walmart.com
GIGABYTE X570S AORUS ELITE AX AMD Ryzen PCIe 4.0 SATA 6Gb/s USB Motherboard 889523028827 | eBay
GIGABYTE B550 AORUS ELITE V2 AM4 AMD B550 ATX Motherboard with Dual M.2, SATA 6Gb/s, USB 3.2 Gen 2, 2.5 GbE LAN, PCIe 4.0 - Newegg.com
ASUS TUF GAMING B550-PLUS WIFI II AMD B550 (Ryzen AM4) ATX gaming motherboard with PCIe 4.0 TUF GAMING B550-PLUS WIFI II - Best Buy
Source DDR4 3200 MHz Intel H610 PCIe 4.0 Motherboard PRIME H610M-K on m.alibaba.com
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
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 - Walmart.com