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OWC

OWC 256GB (4x64GB) DDR4 2400 CL17 ECC Load Reduced LRDIMM Kit for Cisco UCS B200 M4 C220 M4

SKU CH-BJ1M-BJBT3

A 256 GB DDR4 ECC load-reduced kit of four 64 GB modules at 2400 MHz CL17 for Cisco UCS B200 M4 and C220 M4 servers

  • Capacity256GB (4 x 64GB)
  • Type288-Pin DDR4 ECC LRDIMM
  • SpeedDDR4 2400 (PC4 19200)
  • CAS LatencyCL17
  • Voltage1.2V
  • ECCYes

Capacity 256GB (4 x 64GB)

  • 256 GB server memory kit expands capacity for Cisco UCS B200 M4 and C220 M4
  • DDR4 2400 PC4-19200 CL17 delivers 19200 MT/s bandwidth at 1.2 V
  • ECC load-reduced 4Rx4 modules protect data integrity in enterprise workloads
  • 288-pin LRDIMM form factor installs directly into compatible Cisco UCS slots
  • Four matched 64 GB modules enable quad-channel performance for virtualisation and databases

Server Memory Kit

This OWC kit provides 256GB of DDR4 ECC Load Reduced memory across four 64GB modules. It is built for administrators upgrading Cisco UCS B200 M4 or C220 M4 servers. The modules operate at 1.2V and carry a CL17 latency rating. This memory will not work in standard desktop computers.

LRDIMM Constraints

Load Reduced DIMMs reduce electrical load on the server memory bus to allow higher total capacity. They cannot be mixed with unbuffered or standard registered ECC modules in the same system. The kit is backward compatible with 2133MHz operation if the platform requires it. Buyers needing standard UDIMM or RDIMM memory should look elsewhere.

Capacity Decider

The 256GB total capacity in a four-module configuration is the specification that determines fit. Verify the server has four available 288-pin slots and supports 4Rx4 LRDIMM population rules. This kit replaces Cisco part number UCSML1X644RVA. Systems requiring different densities or rank structures will not accept this kit.

Highlights

  • 256 GB server memory kit expands capacity for Cisco UCS B200 M4 and C220 M4
  • DDR4 2400 PC4-19200 CL17 delivers 19200 MT/s bandwidth at 1.2 V
  • ECC load-reduced 4Rx4 modules protect data integrity in enterprise workloads
  • 288-pin LRDIMM form factor installs directly into compatible Cisco UCS slots
  • Four matched 64 GB modules enable quad-channel performance for virtualisation and databases

Specifications

BrandOWC
Part Number2L4D44R4256S
Capacity256GB (4 x 64GB)
Type288-Pin DDR4 ECC LRDIMM
SpeedDDR4 2400 (PC4 19200)
CAS LatencyCL17
Voltage1.2V
ECCYes
Buffered/RegisteredLoad Reduced
Rank4Rx4
Heat SpreaderNo
Compatible SystemCisco UCS B200 M4
Cisco UCS C220 M4

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Questions about this item

Should I choose the 256GB kit with four 64GB modules or a different capacity for my Cisco UCS B200 M4?

The 256GB kit provides four 64GB LRDIMMs that fill four slots on the Cisco UCS B200 M4 or C220 M4, delivering the full capacity in a single matched set.

What does the DDR4 2400 CL17 rating mean once the modules are installed in a Cisco UCS server?

The modules run at 2400 MT/s with CAS latency 17 at 1.2V, and they will also operate at 2133 MT/s if the platform requires the lower speed.

How does the ECC Load Reduced 288-pin interface affect what I can install alongside these modules?

These 4Rx4 LRDIMMs must not be mixed with unbuffered or standard registered ECC DIMMs; only identical Load Reduced modules are supported in the same system.

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