b200m slotMemory 24 total slots for registered ECC DIMMs for up to 768 GB total memory capacity (B200 M3 confured with 2 CPUs using 32 GB DIMMs) IO Mezzanine adapters: One connectorUCS B200 M4 Overview. The UCS B200 M4 provides: Up to two multicore Intel Xeon processor E5-2600 v4 and v3 series CPUs for up to 44 processing cores.