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Two green circuit boards with gold edge connectors and black memory chips, no heat spreaders

OWC

OWC 128GB (2x64GB) DDR4 2400MHz CL17 4Rx4 ECC LRDIMM 1.2V 288-pin Server RAM

SKU CH-CA83-WZJR7

128 GB dual-channel DDR4 2400 MHz ECC load-reduced server kit with CL17 latency and 1.2 V operation

  • Capacity128GB (2 x 64GB)
  • Type288-Pin DDR4 ECC LRDIMM
  • SpeedDDR4 2400 (PC4 19200)
  • CAS LatencyCL17
  • Voltage1.2V
  • ECCYes

Capacity 128GB (2 x 64GB)

  • ECC load-reduced design protects data integrity in servers
  • 128GB dual-channel kit maximises memory capacity for demanding workloads
  • DDR4 2400MHz CL17 speed balances throughput and latency
  • 2V operation reduces power draw in dense configurations
  • Backward compatible with 2133MHz systems for flexible deployment

Capacity and configuration

This kit provides 128 GB of DDR4 server memory in a matched pair of 64 GB modules. Each stick is a 288-pin LRDIMM running at 2400 MHz with CL17 latency and 1.2 V operation. The load-reduced design and on-die ECC are built for multi-socket platforms that require registered, error-correcting memory.

Suitable systems and mismatched needs

The modules are validated for server, workstation and NAS platforms that accept DDR4 LRDIMMs. They will not work in standard desktop PCs or consumer laptops that only support unbuffered non-ECC DIMMs. Buyers needing memory for a regular desktop motherboard should look elsewhere.

Deciding specification

The load-reduced ECC LRDIMM form factor is the single attribute that determines fit; the memory must be installed in a system whose memory controller and BIOS explicitly support DDR4 LRDIMM modules.

Highlights

  • ECC load-reduced design protects data integrity in servers
  • 128GB dual-channel kit maximises memory capacity for demanding workloads
  • DDR4 2400MHz CL17 speed balances throughput and latency
  • 2V operation reduces power draw in dense configurations
  • Backward compatible with 2133MHz systems for flexible deployment

Specifications

BrandOWC
Part Number2L4D44R4128P
Capacity128GB (2 x 64GB)
Type288-Pin DDR4 ECC LRDIMM
SpeedDDR4 2400 (PC4 19200)
CAS LatencyCL17
Voltage1.2V
ECCYes
Buffered/RegisteredLoad Reduced
Rank4Rx4
Multi-channel KitDual Channel Kit
Heat SpreaderNo

Other versions of this model

5 more in the same range

Same family, different memory, cooler or clock — compare before you commit.

Questions about this item

Does the 288-pin DDR4 LRDIMM fit a standard server DIMM slot?

Yes, the modules use the 288-pin DDR4 LRDIMM form factor required by compatible server and workstation boards.

What is the correct installation sequence for the dual-channel 2 x 64 GB kit?

Install one module in each channel — typically slot 1 and slot 3 — so the memory controller sees a matched pair.

When should the ECC LRDIMMs be replaced in a 24/7 server?

Replace them if the system logs correctable ECC errors that climb steadily or if the modules fail a full memory diagnostic.

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