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Two green DDR4 ECC LRDIMM sticks, black chips, gold contacts

OWC

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

SKU CH-E37M-MG75Z

Adds 256 GB of DDR4 2933 ECC LRDIMM server memory for HP Apollo 4200 Gen10 and 6500 Gen10 systems

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

Capacity 256GB (2 x 128GB)

  • 256GB kit expands server capacity with two 128GB modules
  • DDR4 2933 speed boosts throughput for demanding workloads
  • ECC load-reduced design protects data integrity in critical systems
  • 2V operation reduces power draw per module
  • Validated for HP Apollo 4200 Gen10 and 6500 Gen10 platforms

OWC 256GB DDR4 LRDIMM kit

This OWC kit supplies 256 GB of DDR4 memory as two 128 GB LRDIMM modules rated at 2933 MT/s with CL21 latency. The load-reduced ECC design targets HP Apollo 4200 Gen10 and 6500 Gen10 servers that require registered error-correcting memory. It will not work in standard desktop computers or in systems that accept only unbuffered or regular registered DIMMs.

Server memory upgrade considerations

Each module uses a 288-pin DDR4 form factor and operates at 1.2 V, matching the voltage of the supported Apollo platforms. Because the sticks are load-reduced, they must populate slots that the server firmware recognises as LRDIMM-capable and cannot be mixed with unbuffered or standard registered modules. The kit frees the builder from sourcing individual HP part numbers such as P19047-H21 or P11040-B21.

Capacity headroom for virtualization workloads

The 256 GB total capacity supports dense virtualization, large in-memory databases and high-thread-count compute tasks on the compatible Apollo systems. Backward compatibility with 2133, 2400 and 2666 MT/s buses allows deployment in older configurations, though maximum bandwidth is reached only at the native 2933 MT/s rate. Workloads that exceed 256 GB per node will require additional memory channels or higher-density modules not included in this kit.

Highlights

  • 256GB kit expands server capacity with two 128GB modules
  • DDR4 2933 speed boosts throughput for demanding workloads
  • ECC load-reduced design protects data integrity in critical systems
  • 2V operation reduces power draw per module
  • Validated for HP Apollo 4200 Gen10 and 6500 Gen10 platforms

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 SystemHP Apollo 4200 Gen10
HP Apollo 6500 Gen10

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Questions about this item

How many ranks does each 128GB module present to the memory controller?

Each module is a 4Rx4 device, so it presents four ranks to the controller.

What is the operating voltage and typical power draw per module under continuous load?

The modules run at 1.2V; power draw scales with frequency and rank activity but stays within standard DDR4 LRDIMM limits at 2933MHz.

Which HP Apollo systems must the host already have for this kit to be recognised and function?

The kit is validated for HP Apollo 4200 Gen10 and 6500 Gen10 servers.

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