Thats a marketing name not DCSM model   MT DT SFF USFF

 Differences between Marketing Name include variances in offered CPU models, operating systems, available configuration feature
s, and external fascia industrial design and color.

Regulatory Model (Mini-Tower): DCSM or DCSM1F

Regulatory Model (Desktop): DCNE or DCNE1F

Regulatory Model (Small Form Factor): DCCY or DCCY1F

Regulatory Model (Ultra Small Form Factor): DCTR or DCTR1F

http://www.dell.com/downloads/global/corporate/environ/comply/optix_745flx_dcsm.pdf

http://www.dell.com/downloads/global/corporate/environ/comply/optix_745_dcsm.pdf