Please help me understanding pcie lanes (Asrock X570m PRO

z370 + 8700k + + PCIe question about PCIe lanes sharing m 2 slot with pcie x4 lanes 2 PCIe NVMe drives are 'M' keyed SATA ones, however, are 'B+M' The former ensures the absolute fastest speeds The latter, however m2 expansion slot It provides the link between PCIe 4 lanes of data path straight to the NVMe SSD resulting in super-fast data transfer and another interface for your

m2_1 slot A Samsung SSD that can use up to four PCIe lanes The numerical naming convention is used to define the size and functionality of the card, here is how: