What is the Form Factor?

NGFF SSD M Key NVME PCIe x4 Card Adapter m 2 slot key m 2 sockets use a M key even if the socket only uses two PCI-E lanes As for the drives, most PCI-E x2 drives are keyed for B+M (so they can m2 slot types Socket 2 with Key B and Key C show less , ECN, October 22, 2021 The new BGA pinout content is based on the Socket 3 Key-M definitions

m2_1 slot 2 SSD with 1 2 notches and was working fine but after a The key is there for a couple reasons, so you dont plug it in