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Green 288-pin DDR4 LRDIMM module with black memory chips and gold contacts

OWC

OWC 256GB DDR4 2933 PC4-23400 CL21 8Rx4 288-pin 1.2V ECC Load Reduced LRDIMM memory upgrade

SKU CH-VA2J-CS9QH

A single 256GB DDR4 2933MHz ECC load-reduced DIMM for Cisco UCS B200 M5, B480 M5, C220 M5, C240 M5 and C480 M5 servers

Capacity 256GB

  • 256GB single-module capacity expands server memory density
  • DDR4 2933MHz CL21 speed delivers high-throughput performance
  • ECC load-reduced design protects data integrity under load
  • 2V operation reduces power draw per module
  • Compatible with Cisco UCS B200 M5 B480 M5 C220 M5 C240 M5 C480 M5

Server-grade capacity

This single 256GB DDR4 LRDIMM delivers high-density memory for Cisco UCS B200 M5, B480 M5, C220 M5, C240 M5 and C480 M5 servers. It operates at 2933MHz with CL21 latency and 1.2V power draw, using 8Rx4 organisation and ECC load-reduced technology for data integrity in enterprise workloads.

Sustained enterprise operation

Load-reduced architecture reduces electrical loading on the memory bus, allowing dense populations to maintain 2933MHz throughput under continuous multi-threaded demand. Backward compatibility with 2133MHz, 2400MHz and 2666MHz lets the module clock down automatically when the platform requires lower speeds without sacrificing stability.

Density upgrade path

The module replaces Cisco part UCSML256G8RTH and consolidates capacity into one slot, freeing remaining DIMM positions for future expansion. It is not compatible with standard desktop systems and cannot be mixed with unbuffered or registered ECC memory, so buyers needing consumer platforms or mixed-memory configurations must look elsewhere.

Highlights

  • 256GB single-module capacity expands server memory density
  • DDR4 2933MHz CL21 speed delivers high-throughput performance
  • ECC load-reduced design protects data integrity under load
  • 2V operation reduces power draw per module
  • Compatible with Cisco UCS B200 M5 B480 M5 C220 M5 C240 M5 C480 M5

Specifications

No published specifications for this item yet.

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Questions about this item

Does the 1.2V 256GB LRDIMM run hot or need extra cooling in a Cisco UCS chassis running all day?

The module operates at the standard 1.2V DDR4 voltage. Load-reduced DIMMs reduce electrical load on the memory bus, which helps thermals in dense Cisco UCS B200 M5 or C220 M5 configurations.

My Cisco UCS B480 M5 currently has registered ECC DIMMs — can I add this 256GB LRDIMM alongside them?

No. The manufacturer highlights state this ECC load-reduced memory cannot be mixed with registered ECC or unbuffered memory. All slots must use the same LRDIMM type.

Will this PC4-23400 2933MHz module work if my C240 M5 BIOS only supports 2400MHz memory today?

Yes. The specifications list backward compatibility with 2133MHz, 2400MHz and 2666MHz speeds. The DIMM will down-clock to the highest speed the platform allows.

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