linux - Network Interface Card not using the correct PCI link ...
The different versions of PCI Express are both forward- and backward-compatible with each other, in the sense that you can run a PCIe 4.0 SSD in a PCIe 3.0 slot, for example.
PCIe 4.0: Everything you need to know, from specs to compatibility ...
Because Ryzen 3000 “only” can support a single-slot x16 PCIe 4.0, you have to choose whether to put your x16 PCIe 4.0 graphics card or your x16 PCIe 4.0 SSD in that slot.
Can I Use a PCIe 3.0 Graphics Card in a PCIe 4.0 Slot? - TechReviewer
Learn whether you have to upgrade your PCIe 2.0 or PCIe 3.0 graphics card to work in a newer PCIe 4.0 motherboard slot and how graphics performance could be affected. You may