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Four green 288-pin DDR4 LRDIMM modules in a row

OWC

OWC 1TB DDR4 2933 PC4-23400 CL21 8Rx4 288-pin 1.2V ECC Load Reduced LRDIMM 4x256GB memory upgrade

SKU CH-BHZC-32H7S

A 1 TB ECC load-reduced DDR4 kit of four 256 GB modules running at 2933 MHz CL21, compatible with Dell PowerEdge R840 and R940xa servers

Capacity 1TB (4 x 256GB)

  • 1 TB server memory upgrade in four 256 GB modules
  • ECC load-reduced DDR4 2933 MHz CL21 for data integrity
  • 2 V JEDEC-standard DIMMs lower power draw
  • 288-pin LRDIMMs validated for Dell PowerEdge R840 and R940xa
  • Backward compatible with 2133, 2400 and 2666 MHz platforms

Server memory upgrade kit

This OWC kit provides 1 TB of DDR4 ECC load-reduced memory in four 256 GB modules. It is designed for Dell PowerEdge R840 and R940xa servers and workstations that require registered LRDIMM technology. The modules operate at 2933 MHz with CL21 latency and 1.2 V. Standard desktop computers cannot use this memory type.

Build integration requirements

Each module uses a 288-pin LRDIMM form factor and must be installed in matched sets for the target platforms. The kit frees all four slots with a single purchase and cannot be mixed with unbuffered or standard registered DIMMs. Backward compatibility allows operation at 2133, 2400 and 2666 MHz speeds if the system firmware requires it. JEDEC and RoHS compliance ensures a warranty-safe upgrade path.

Thermals and power profile

The 1.2 V DDR4 design keeps power draw low for high-density server configurations. ECC load-reduced architecture reduces electrical loading on the memory bus, which helps maintain signal integrity under sustained workloads. No active cooling is included; airflow through the server chassis handles thermal management. This memory is not intended for consumer desktops or non-ECC platforms.

Highlights

  • 1 TB server memory upgrade in four 256 GB modules
  • ECC load-reduced DDR4 2933 MHz CL21 for data integrity
  • 2 V JEDEC-standard DIMMs lower power draw
  • 288-pin LRDIMMs validated for Dell PowerEdge R840 and R940xa
  • Backward compatible with 2133, 2400 and 2666 MHz platforms

Specifications

No published specifications for this item yet.

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Questions about this item

How many 288-pin LRDIMM slots does the Dell PowerEdge R840 or R940xa need free to install this 1 TB kit?

The kit contains four 256 GB modules, so four empty 288-pin LRDIMM slots are required.

What is the operating voltage and heat profile of these ECC load-reduced DIMMs during continuous server workloads?

Each module runs at 1.2 V; load-reduced buffering lowers electrical load on the memory bus, reducing heat under sustained use.

Which existing memory types are incompatible and must not be mixed with these 8Rx4 LRDIMMs?

They cannot be mixed with unbuffered or ECC registered DIMMs; only identical load-reduced modules should populate the remaining slots.

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