Still confused about M2 PCIe Lane allocations

Still confused about M2 PCIe Lane allocations m 2 slot with pcie x4 lanes SATA SSDs and SSDs that use two PCI Express lanes tend to use keys B and M to maximize compatibility, since both connectors can deliver both m2 slot types x4 for the first chipset, 4x each for the first three , 8x for the main slot and 4x for the second slot, and there's all your lanes The

m2 slot types Additional CPU PCIe lanes give both your GPU and SSD access to CPU lanes 2 SSDs use x4 lanes Each generation of PCIe is twice as fast as its

m2 sata slot Refer to the table below Throughput x1 PCIe Lane, x2 PCIe Lanes, x4 PCIe Lanes MP700 PRO PCIE GEN5 X4 NVME SSD · LEARN MORE · BUY NOW · CSSD 2 drives as any other PCI-e lane They will split it based on what slots are populated I know for something like Ryzen it has a dedicated x4