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Four green circuit boards with black memory chips and gold edge connectors

OWC

OWC 128GB (4x32GB) DDR4 2666MHz CL19 ECC Registered RDIMM 1.2V 288-pin Server RAM

SKU CH-VPJA-HKCD7

Adds 128GB of DDR4 2666MHz ECC registered server memory in a four-module kit

  • Capacity128GB (4 x 32GB)
  • Type288-Pin DDR4 ECC RDIMM
  • SpeedDDR4 2666 (PC4 21300)
  • CAS LatencyCL19
  • Voltage1.2V
  • ECCYes

Capacity 128GB (4 x 32GB)

Show 7 more configurations

Rank 2Rx4

  • 128GB total capacity from four 32GB modules
  • DDR4 2666MHz speed with CL19 latency for responsive server performance
  • ECC registered design detects and corrects data errors automatically
  • 2V operation reduces power draw in dense server deployments
  • Backward compatible with 2133MHz and 2400MHz systems for flexible upgrades

Server memory kit

This OWC kit provides 128GB of DDR4 ECC registered memory in four 32GB modules. It runs at 2666MHz with CL19 latency at 1.2V. The 288-pin RDIMMs are built for servers, workstations and NAS systems that require registered error-correcting memory.

Upgrade from lower capacity or slower DDR4

The kit suits administrators expanding memory in compatible platforms or replacing 2133MHz and 2400MHz modules with faster 2666MHz parts. The jump is worthwhile when workloads need the full 128GB capacity and registered ECC reliability for data integrity.

Verify platform requirements before ordering

Confirm the system supports DDR4 288-pin registered ECC RDIMMs and accepts 2Rx4 modules at 1.2V. This memory will not work in standard desktop computers and cannot be mixed with unbuffered modules. Check the motherboard or server manual for maximum supported capacity per slot.

Highlights

  • 128GB total capacity from four 32GB modules
  • DDR4 2666MHz speed with CL19 latency for responsive server performance
  • ECC registered design detects and corrects data errors automatically
  • 2V operation reduces power draw in dense server deployments
  • Backward compatible with 2133MHz and 2400MHz systems for flexible upgrades

Specifications

BrandOWC
Part Number2R6D42R4128S
Capacity128GB (4 x 32GB)
Type288-Pin DDR4 ECC RDIMM
SpeedDDR4 2666 (PC4 21300)
CAS LatencyCL19
Voltage1.2V
ECCYes
Buffered/RegisteredRegistered
Rank2Rx4
Multi-channel KitDual Channel Kit
Heat SpreaderNo

Other versions of this model

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Questions about this item

Does this 288-pin DDR4 RDIMM fit a standard server DIMM slot?

Yes, the modules use the 288-pin DDR4 RDIMM form factor required by server and workstation motherboards that support registered ECC memory.

What is the correct way to install the four 32 GB sticks for dual-channel operation?

Populate the four modules in the motherboard's designated channel pairs — usually slots of the same colour — so each channel receives two 2Rx4 ranks.

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

Replace them if the system logs correctable ECC errors that climb steadily, or after a sustained over-temperature event that exceeds the 1.2 V operating envelope.

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