Pcie 3.0 Graphics Card List
Can you put a PCIe 4.0 card in a 2.0 slot? ... However, if you connect a PCIe 3.0 card to a PCIe 4.0 slot, the card will perform to the PCIe 3.0 specs.
Can You Use a PCIe 4.0 SSD On Your Existing Motherboard?
Can I Put a 4.0 NVMe in a 3.0 Slot? ... You can install a faster NVMe M.2 2230 SSD supporting the PCIe 4.0 standard into an older motherboard slot that only supports the PCIe 3.0 specification.
Can I Use a PCIe 4.0 Graphics Card in a PCIe 3.0 Slot? - TechReviewer
You can plug a PCIe 4.0 device, like a graphics card, into a PCIe 3.0 slot. ... For instance, a PCIe 4.0 graphics card in PCIe 3.0 slot may experience only a marginal performance drop.