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Two green circuit boards with gold edge connectors and black memory chips

OWC

OWC 256GB (2x128GB) DDR4-2933 ECC LRDIMM CL21 288-pin 1.2V 4Rx4 memory upgrade

SKU CH-B8RC-CAS8X

ECC Load Reduced DDR4 kit of two 128 GB modules at 2933 MHz CL21 for Cisco UCS B200 M5, B480 M5, C220 M5, C240 M5 and C480 M5 servers

  • Capacity256GB (2 x 128GB)
  • Type288-Pin DDR4 ECC LRDIMM
  • SpeedDDR4 2933 (PC4 23400)
  • CAS LatencyCL21
  • Voltage1.2V
  • ECCYes

Capacity 256GB (2 x 128GB)

Show 2 more configurations
  • 256 GB total capacity from two 128 GB modules for dense server workloads
  • DDR4-2933 speed with CL21 latency and 1.2 V operation for efficient throughput
  • ECC load-reduced design detects errors and lowers electrical load on the memory bus
  • 288-pin LRDIMM form factor built for Cisco UCS B200 M5 B480 M5 C220 M5 C240 M5 C480 M5
  • Backward compatible with 2133 2400 2666 MHz platforms for flexible deployment

Server memory upgrade

This OWC kit provides 256GB of DDR4-2933 ECC Load Reduced DIMM memory in a matched pair of 128GB modules. It is built for Cisco UCS B200 M5, B480 M5, C220 M5, C240 M5 and C480 M5 servers and workstations that require registered LRDIMM modules.

Compatibility check

Verify that your system uses 288-pin DDR4 LRDIMM slots and supports 4Rx4 rank configuration at 1.2V. This memory cannot be mixed with unbuffered or standard registered ECC DIMMs, and it will not fit desktop or consumer motherboards.

Thermals and power

Modules run at the standard 1.2V DDR4 voltage without heat spreaders, relying on server chassis airflow for cooling. Power draw scales with the 256GB capacity and 4Rx4 organisation, while noise remains dependent on the host system fan profile.

Highlights

  • 256 GB total capacity from two 128 GB modules for dense server workloads
  • DDR4-2933 speed with CL21 latency and 1.2 V operation for efficient throughput
  • ECC load-reduced design detects errors and lowers electrical load on the memory bus
  • 288-pin LRDIMM form factor built for Cisco UCS B200 M5 B480 M5 C220 M5 C240 M5 C480 M5
  • Backward compatible with 2133 2400 2666 MHz platforms for flexible deployment

Specifications

BrandOWC
Part Number2L9D44R4256P
Capacity256GB (2 x 128GB)
Type288-Pin DDR4 ECC LRDIMM
SpeedDDR4 2933 (PC4 23400)
CAS LatencyCL21
Voltage1.2V
ECCYes
Buffered/RegisteredLoad Reduced
Rank4Rx4
Heat SpreaderNo
Compatible SystemCisco UCS B200 M5
Cisco UCS B480 M5
Cisco UCS C220 M5
Cisco UCS C240 M5
Cisco UCS C480 M5

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Questions about this item

What does the 256 GB kit contain and is any extra hardware required?

The kit contains two 128 GB DDR4-2933 ECC LRDIMM modules. No additional hardware is required for installation in a compatible Cisco UCS server.

How do I choose between the listed Cisco UCS models for this 256 GB kit?

This 256 GB kit is validated for Cisco UCS B200 M5, B480 M5, C220 M5, C240 M5 and C480 M5 servers. Select the kit that matches your exact server model.

What does the 2933 MHz rating mean once the modules are installed in a server?

The modules run at 2933 MHz (PC4-23400) with CL21 latency at 1.2 V. They also operate at 2666, 2400 or 2133 MHz if the server platform requires a lower speed.

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