PCIe vs PCIe : What's the difference?

PCIe 3 Transfer Rates :: Hardware and Operating Systems pcie 3 slot While PCIe is compatible with older generation cards, the older cards will not be able to access the full bandwidth of PCIe As an pcie slot gpu First of all, I know that a PCIe 4 SSD NVMe will be running at gen 3 speeds and bottlenecked by the PCIe 3 slot But I'm wondering if there are

pcie slot bracket Slot 2, PCI Express x16 ; Slot 3, Slot not available on this board ; Slot 4, Slot not available on this board ; Slot 5, PCI Express x8 in a