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Two green DDR4 RDIMM sticks, bare chips, no heat spreader

OWC

OWC 256GB (2x128GB) DDR4 3200MHz CL22 4Rx4 ECC Registered RDIMM 1.2V 288-pin Server RAM

SKU CH-R612-W5G5G

256GB dual-channel DDR4 3200MHz ECC registered server memory kit with CL22 latency and 1.2V operation

  • Capacity256GB (2 x 128GB)
  • Type288-Pin DDR4 ECC RDIMM
  • SpeedDDR4 3200 (PC4 25600)
  • CAS LatencyCL22
  • Voltage1.2V
  • ECCYes

Capacity 256GB (2 x 128GB)

Show 4 more configurations

Rank 4Rx4

  • 256 GB total capacity from two 128 GB modules
  • DDR4 3200 MHz speed for fast data throughput
  • ECC registered design detects and corrects memory errors
  • 2 V operation reduces server power draw
  • JEDEC and RoHS compliant for warranty-safe upgrades

Server DDR4 256GB kit for workstations

This OWC kit provides 256GB of DDR4 memory across two 128GB registered ECC RDIMMs. It is built for servers and workstations that require error-correcting registered modules running at 3200MHz with a CL22 latency. The dual-channel kit operates at 1.2V and conforms to JEDEC PC4-25600 specifications.

Simple DIMM installation with strict compatibility

The 288-pin modules install into standard DDR4 RDIMM slots without tools or heat spreaders to remove. The critical step is verifying that your platform supports 4Rx4 registered ECC memory, because these modules will not work in desktop boards that accept only unbuffered non-ECC DIMMs. Mixing them with unbuffered memory is also not supported and will prevent the system from posting.

Confirm registered ECC support and rank limits

Before ordering, check your motherboard or server documentation for explicit support of registered ECC RDIMMs and the maximum 4Rx4 rank configuration per channel. Ensure the system requires DDR4 3200MHz operation at 1.2V and can address the full 256GB capacity across the available slots. This kit is not suitable for standard desktop computers or any platform limited to unbuffered memory.

Highlights

  • 256 GB total capacity from two 128 GB modules
  • DDR4 3200 MHz speed for fast data throughput
  • ECC registered design detects and corrects memory errors
  • 2 V operation reduces server power draw
  • JEDEC and RoHS compliant for warranty-safe upgrades

Specifications

BrandOWC
Part Number3R2D44R4256P
Capacity256GB (2 x 128GB)
Type288-Pin DDR4 ECC RDIMM
SpeedDDR4 3200 (PC4 25600)
CAS LatencyCL22
Voltage1.2V
ECCYes
Buffered/RegisteredRegistered
Rank4Rx4
Multi-channel KitDual Channel Kit
Heat SpreaderNo

Other versions of this model

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Questions about this item

How do I confirm the 256GB kit is running at 3200MHz CL22 after installation?

Enter the server BIOS or UEFI and verify the memory speed reads 3200MHz with CAS latency 22; the registered ECC modules will also report ECC active in the system health or IPMI interface.

What ships in the box and what must I source separately?

The package contains two 128GB 288-pin DDR4 3200MHz CL22 4Rx4 ECC registered RDIMMs; no heat spreaders, cables, tools or additional DIMMs are included.

Which capacity version should I choose for a dual-channel server board?

This 256GB dual-channel kit provides two matched 128GB modules, the correct population for a two-channel server memory architecture.

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