PCIe 5.0 will be ready before PCIe 4.0 can launch | TechSpot
Enabling PCIe 4.0 on a B450 Motherboard? - YouTube
PCIe 3.0 vs 4.0 for Gaming (Does PCIe 4 Matter?)
Amazon.com: StarTech.com 4 Port PCI Express USB 3.0 Card - 2 External & 2 Internal - SATA Power - UASP Support - 2x Int Motherboard-Style Headers (PEXUSB3S2EI) : Electronics
PCIe 3.0 vs PCIe 4.0 – what are the benefits and can you run it? | PCGamesN
Can you use an RTX 3060 which has PCI 4.0 on a motherboard that has a PCI 3.0 slot? - Quora