Attributes . The Cisco UCS B420 M3 is a full-width blade . Up to four of these high-density, 4-socket blade servers can reside in the six-rack-unit (6RU) Cisco UCS 5108 Blade Server Chassis. In addition, the Cisco UCS B420 M3 is part of the Cisco Unified Computing System, which combines blade and rack servers with networking and storage access in a single unified system. Centrally configured through unified, model-based management, Cisco UCS simplifies and accelerates deployment of enterprise-class applications running in bare-metal, virtualized, and cloud-computing environments. . Names