CEM stands for Card Electromechanical Specification. This is a PCIe connector and helps to connect and helps to interface high speed interfaces to the host processor. Graphics cards are one of the cards that can be plugged in to these connectors.
Here is one example of CEM form factor board used for PCIe probing:
CEM supports different connector sizes x1, x2, x4, x8, x16. CEM PCIe Gen 5 supports data rates up to a maximum of 32GT/s per pair.
The main advantage of CEM is it helps scale up your system to a next generation higher band width capability. The main advantage is the backward compatibility of Gen 5 with previous Generations 4/3/2/1.
Electrical Specifications:
- Pitch of 1mm
- Impedance of 85ohms
- Vertical connector
- SMT version
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