M.2 (B-key) ↔ U.2 (SFF-8639)

Compatibility check and signal path analysis

Adapter Required

These connectors are not directly compatible. An adapter or converter cable is needed.

Recommended: M.2 (B-key) to U.2 (SFF-8639) adapter

Signal Path

M.2 (B-key) Unknown
Adapter
U.2 (SFF-8639) Unknown

M.2 (B-key)

Family Storage
Form Factor Card-edge socket
Pin Count 67
Reversible No

U.2 (SFF-8639)

Family Storage
Form Factor Dual-port wide
Pin Count 68
Reversible No

Notes

M.2 (B-key) to U.2 (SFF-8639): Both are storage connectors but may use different interfaces. An adapter or enclosure may bridge them, but speed will be limited by the slower interface. The M.2 (B-key) (Storage) and U.2 (SFF-8639) (Storage) share the same connector family.