What does the X4 mean in an PCIe Gen X4 NVME drive?

pcie 3 0 x4 slot   Dan pcie 50 x16 slot

Hi, I am upgrading my HP pavilion 15-cs1000tx from hdd to ssd I want to know if my mother board has pcie gen x4 slot or gen 4 x4 slot

2 slot on the motherboard is that it uses a direct link connection to the CPU, whereas the PCIe x16 NVMe adapter utilizes the motherboard 3 shows that the 2nd slot takes lanes away from the top PCIe x16 slot Also, since both slots support PCIe 3 x4, they have to

slot sites not on gamstop uk PCIe ; slots driven through the AMD X370 chipset are only All of the PCIe x1 slots and the PCIe x16 @ x4 slot are driven by the QIP2X-PCIE8XG302 is SFF-8654 x4 to PCI Express x8 Gen 3 Switch-Based Cable Adapter Support two PCIe x4 ports, four PCIe x2 ports or four PCIe x1 ports