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Four green DDR4 server memory modules with gold contacts

OWC

OWC 512GB (4x128GB) DDR4 2666MHz CL19 4Rx4 ECC Registered RDIMM 1.2V 288-pin Server RAM

SKU CH-5FYR-3ZPWX

A 512GB quad-channel kit of four 128GB DDR4 2666MHz CL19 ECC registered RDIMMs at 1.2V for servers and workstations

  • Capacity512GB (4 x 128GB)
  • Type288-Pin DDR4 ECC RDIMM
  • SpeedDDR4 2666 (PC4 21300)
  • CAS LatencyCL19
  • Voltage1.2V
  • ECCYes

Capacity 512GB (4 x 128GB)

Ver 7 configuraciones más

Rank 4Rx4

  • Massive 512GB capacity from four 128GB modules
  • ECC registered design protects data integrity in servers
  • DDR4 2666MHz CL19 speed meets JEDEC standards
  • Low 1.2V voltage reduces power draw per module
  • Backward compatible with 2133MHz and 2400MHz systems

Server-grade ECC registered kit

This OWC kit delivers 512GB of DDR4 ECC registered memory across four 128GB modules. It is built for servers, workstations and NAS systems that require error correction and registered signalling. Standard desktop platforms cannot use these modules and they must not be mixed with unbuffered memory.

288-pin RDIMM form factor

Each module uses the 288-pin RDIMM interface with a 4Rx4 rank structure and operates at 1.2V. The kit is a dual-channel configuration compliant with JEDEC PC4-21300 specifications and RoHS standards. No heat spreaders are fitted, so airflow in the chassis must handle thermal management directly.

2666MHz CL19 at 1.2V

Rated speed is 2666MHz with CAS latency 19 and the modules also run at 2133MHz and 2400MHz where the platform requires it. Registered buffering and ECC add minimal latency overhead while maintaining data integrity under sustained server workloads. Power draw stays at the standard DDR4 1.2V level.

Puntos fuertes

  • Massive 512GB capacity from four 128GB modules
  • ECC registered design protects data integrity in servers
  • DDR4 2666MHz CL19 speed meets JEDEC standards
  • Low 1.2V voltage reduces power draw per module
  • Backward compatible with 2133MHz and 2400MHz systems

Especificaciones

BrandOWC
Part Number2R6D44R4512S
Capacity512GB (4 x 128GB)
Type288-Pin DDR4 ECC RDIMM
SpeedDDR4 2666 (PC4 21300)
CAS LatencyCL19
Voltage1.2V
ECCYes
Buffered/RegisteredRegistered
Rank4Rx4
Multi-channel KitDual Channel Kit
Heat SpreaderNo

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Preguntas sobre este artículo

What speed does the DDR4 2666MHz PC4-21300 rating cap in practice?

The kit runs at 2666MHz CL19 and will down-clock to 2400MHz or 2133MHz if the server platform requires a lower speed.

What physical slot and clearance does the 288-pin RDIMM need?

Each 128GB module uses a standard 288-pin DDR4 RDIMM form factor with no heat spreader, so it fits any server DIMM slot that accepts registered memory.

How are the four 128GB sticks installed for dual-channel operation, and what step is often missed?

Populate the four modules in the server's recommended slot pairs for dual-channel mode, and verify the BIOS recognises all 512GB at 2666MHz after the first boot.

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