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Two green 288-pin DDR4 LRDIMM modules with black chips, no heat spreader

OWC

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

SKU CH-JWZ3-25HAY

A 256 GB DDR4 2933 ECC LRDIMM kit for Dell PowerEdge XR4510c and XR4520c servers

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

Capacity 256GB (2 x 128GB)

  • 256 GB kit (2 × 128 GB) expands server capacity
  • ECC load-reduced design protects data integrity in Dell PowerEdge XR4510c and XR4520c
  • DDR4 2933 CL21 at 1.2 V delivers rated speed with low power draw
  • Backward compatible with 2133, 2400 and 2666 MHz systems for flexible deployment
  • JEDEC and RoHS compliant for warranty-safe upgrades

Server-grade capacity for Dell PowerEdge

This 256 GB kit delivers 2 x 128 GB DDR4 2933 LRDIMM modules built for the Dell PowerEdge XR4510c and XR4520c. The ECC load-reduced design targets servers and workstations that need maximum density per slot. It will not work in standard desktops or alongside unbuffered or registered ECC memory.

Low-voltage operation at 1.2 V

Each module runs at 1.2 V with a CL21 latency profile at 2933 MT/s. The load-reduced architecture lowers electrical load on the memory bus, helping thermal headroom in dense chassis. No heat spreaders are fitted, so airflow in the server handles cooling.

JEDEC and RoHS compliance with lifetime support

The kit meets JEDEC standards and is RoHS compliant for a warranty-safe upgrade. Backward compatibility covers 2133, 2400 and 2666 MT/s speeds. OWC provides a limited lifetime warranty with free technical support and an advanced replacement programme.

Highlights

  • 256 GB kit (2 × 128 GB) expands server capacity
  • ECC load-reduced design protects data integrity in Dell PowerEdge XR4510c and XR4520c
  • DDR4 2933 CL21 at 1.2 V delivers rated speed with low power draw
  • Backward compatible with 2133, 2400 and 2666 MHz systems for flexible deployment
  • JEDEC and RoHS compliant for warranty-safe upgrades

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 SystemDell PowerEdge XR4510c
Dell PowerEdge XR4520c

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Questions about this item

How do I install the 288-pin LRDIMM modules in a Dell PowerEdge XR4510c, and what is the common mistake?

Power down the server, open the chassis, align the notch on each 128 GB module with the slot key, and press firmly until the retention clips lock. The step often missed is populating the correct CPU-channel slots in the order shown in the system service manual; wrong order prevents POST.

What maintenance or replacement will the 256 GB ECC LRDIMM kit need over its service life?

No scheduled maintenance is required. If a correctable ECC error count rises above the platform threshold, the faulty 128 GB module should be replaced; otherwise the kit runs for the server's lifetime without service.

What limit appears first when the 2933 MHz CL21 memory runs under sustained load?

The DDR4 2933 MT/s data rate and CL21 latency set the bandwidth ceiling; under continuous heavy workloads the memory controller hits that throughput limit before thermal or voltage constraints become a factor.

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