Cisco Cisco UCS B420 M3 Blade Server 데이터 시트

The standard memory features are:

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DIMMs

— Clock speed: 2400 or 2133 MHz

— Ranks per DIMM: single, dual, or quad

— Operational voltage: 1.2 V

— Registered DIMM (RDIMM) or load-reduced DIMM (LRDIMM)

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Each CPU controls four serial memory interface 2 (SMI-2) channels. Memory buffers convert 
each SMI-2 channel into two DDR4 subchannels. Memory is organized as 3 DIMMs per 
subchannel, totaling 6 DIMMs per SMI-2 channel. See 

NOTE:  You cannot mix RDIMMs with LRDIMMs within the same server.

NOTE:  Memory mirroring is supported and settable using the UCSM Service Profile 
“Memory RAS Configuration” setting.