Examples: typical mobo SATA:
1 PCIe v3 lane == 1.0 GiB/s max (all drives) LSI 9300-8i: 8 PCIe v3 lanes == 8.0 GiB/s max (all drives) LSI 9400-8i: 8 PCIe v4 lanes == 16.0 GiB/s max (all drives)