An M. 2 SSD is "keyed" to prevent insertion of a card connector (male) to an incompatible socket (female) on the host. The M. 2 specification identifies 12 key IDs on the module card and socket interface but M. 2 SSDs typically use three common keys: B, M, and B+M.
Also to know is, what is B key and M key?
As the key positions of B and M are slightly different, the M. SSD can only be installed one way. A 'B' keying (pins 12-19) gives PCI Express SSDs up to 2x lanes of bandwidth, while a 'M' keying (pins 59-66) provides PCI Express SSDs with up to 4x lanes of bandwidth.
Subsequently, question is, what is M key m2?
2, formerly known as the Next Generation Form Factor (NGFF), is a specification for internally mounted computer expansion cards and associated connectors. M. 2 replaces the mSATA standard, which uses the PCI Express Mini Card physical card layout and connectors. It is up to the manufacturer of the M.
What is NVMe M Key?
There are different types of M. 2 slots. A “B-Key” enables SATA or PCIe NVMe SSDs using up to 2 PCIe lanes, while an “M-Key” enables NVMe SSDs with the use of up to 4 PCIe lanes.
Are NVMe and M 2 the same?
Enter NVMe. Standing for “Non-Volatile Memory Express,” NVMe is an open standard developed to allow modern SSDs to operate at the read/write speeds their flash memory is capable of. It is also unrelated to the form factor, which is why NVMe drives can come in both M. 2 or PCIe card form factors.