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Two green DDR4 LRDIMM modules with gold contacts, no heat spreaders

OWC

OWC 256GB (2x128GB) DDR4 2933MHz CL21 4Rx4 ECC LRDIMM 1.2V 288-pin Server RAM

SKU CH-G96E-6R9JA

A 256 GB dual-channel DDR4-2933 ECC LRDIMM kit with CL21 latency and 1.2 V operation for servers and workstations

  • 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 total capacity from two 128 GB modules
  • ECC load-reduced design protects data integrity in servers
  • DDR4 2933 MHz CL21 speed with 1.2 V operation
  • Backward compatible with 2133, 2400 and 2666 MHz systems
  • 288-pin LRDIMM form factor fits server and workstation slots

Server DDR4 ECC LRDIMM Kit

This 256GB dual-channel kit contains two 128GB DDR4 2933MHz CL21 load-reduced DIMMs built for servers, workstations and NAS systems. The modules operate at 1.2V and use 288-pin ECC registered 4Rx4 organisation to deliver high-capacity error-correcting memory for multi-socket platforms.

Installation Notes

Installation follows standard 288-pin DIMM procedure: power down, open the chassis, align the key notch and press firmly until the retention clips engage. The kit will not fit standard desktop motherboards and cannot be mixed with unbuffered or non-ECC modules; mixing ranks or voltages will prevent the system from posting.

Critical Compatibility Spec

The single deciding specification is the load-reduced ECC 4Rx4 DDR4 2933MHz registered form factor, which only works in platforms that explicitly support LRDIMM memory. Buyers needing standard UDIMM, RDIMM or desktop memory must choose a different product.

Highlights

  • 256 GB total capacity from two 128 GB modules
  • ECC load-reduced design protects data integrity in servers
  • DDR4 2933 MHz CL21 speed with 1.2 V operation
  • Backward compatible with 2133, 2400 and 2666 MHz systems
  • 288-pin LRDIMM form factor fits server and workstation slots

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
Multi-channel KitDual Channel Kit
Heat SpreaderNo

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Questions about this item

How can I confirm the 256GB DDR4 2933MHz CL21 ECC LRDIMM kit is running at its rated speed after installation?

Enter the server BIOS or UEFI and verify the memory frequency shows 2933MHz (PC4-23400) with CL21 timings; the modules will down-clock automatically to 2133, 2400 or 2666MHz if the platform requires it.

What ships in the box and what must I source separately for this 2x128GB 288-pin LRDIMM kit?

The package contains two 128GB DDR4 ECC Load Reduced DIMMs; no heat spreaders, cables or tools are included and none are required for installation.

Which capacity version of this OWC DDR4 2933MHz CL21 ECC LRDIMM line should I choose for a dual-channel server upgrade?

This 256GB kit (2×128GB) is the dual-channel configuration; select it when your server has two available 288-pin slots and supports 4Rx4 Load Reduced modules.

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