Which Slot to use?

Confusion between and NVMe : rbuildapc m 2 slot vs nvme Next Generation Form Factor ( ; , uses a NVMe solid-state drive computer bus Interfaces provided through the connector are PCI Express or m2 slot screw pcie is about 4x faster The add in cards plugged into a X4-X16 pcie slot will have some sort of adapter

m2 sata slot The specification identifies 12 keys A–M, but in common use are B and M SATA SSDs are B+M-keyed (can fit in sockets for B-keyed and M-