Which of these products does not have a CMC?

The PowerEdge R630 model does not have a Chassis Management Controller (CMC). This distinction is significant because the R630 is part of Dell's 13th generation of PowerEdge servers, which relies on integrated management features that do not include a separate CMC. Instead, it utilizes a different management architecture based on Integrated Dell Remote Access Controller (iDRAC), which is built into each server for remote management capabilities.

On the other hand, the PowerEdge R620, R730, and R740 models are part of different management setups that employ a CMC. In these servers, the CMC is crucial for managing multiple servers in a chassis, enabling centralized monitoring and control of both power and thermal management, among other features. Thus, recognizing the absence of a CMC in the R630 showcases an understanding of how the different generations of PowerEdge servers are designed with varying management capabilities.