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

OWC

OWC 128GB (4×32GB) DDR4 2666 CL19 ECC Registered RDIMM 1.2V

SKU CH-NE1N-JVKC9

128 GB DDR4 ECC registered RDIMM kit with four 32 GB modules at 2666 MHz CL19 1.2 V for Synology FS3400, FS3410 and FS3600

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

Capacity 128GB (4 x 32GB)

Rank 2Rx4

  • 128 GB capacity across four 32 GB modules for high-density server workloads
  • ECC registered design detects and corrects single-bit errors to protect data integrity
  • DDR4 2666 MHz CL19 at 1.2 V delivers rated speed with standard voltage efficiency
  • JEDEC and RoHS compliant build ensures warranty-safe upgrades in qualified systems
  • Backward compatible with 2133 MHz and 2400 MHz platforms for flexible deployment

OWC 128GB DDR4 2666 ECC RDIMM kit

This kit provides 128GB of DDR4 2666 registered ECC memory in four 32GB modules. It targets servers, workstations and compatible NAS appliances that require registered DIMMs with error correction.

Verify registered ECC support and slot count

Your platform must accept 288-pin DDR4 registered ECC RDIMMs and provide at least four slots for this quad-channel kit. Registered memory cannot be mixed with unbuffered or load-reduced modules. The modules run at 1.2V and are backward compatible with 2133MHz and 2400MHz bus speeds.

Sustained throughput at CL19 2666MT/s

Under continuous load the CL19 timing delivers steady bandwidth for multi-threaded server workloads. JEDEC-standard signalling and registered buffering maintain signal integrity across all four ranks during extended operation.

Puntos fuertes

  • 128 GB capacity across four 32 GB modules for high-density server workloads
  • ECC registered design detects and corrects single-bit errors to protect data integrity
  • DDR4 2666 MHz CL19 at 1.2 V delivers rated speed with standard voltage efficiency
  • JEDEC and RoHS compliant build ensures warranty-safe upgrades in qualified systems
  • Backward compatible with 2133 MHz and 2400 MHz platforms for flexible deployment

Especificaciones

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

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Preguntas sobre este artículo

What does the kit contain and is any extra hardware required?

The kit contains four 32 GB DDR4 2666 CL19 ECC Registered RDIMM modules for a total of 128 GB. No additional hardware is required beyond a compatible 288-pin DDR4 server or workstation board.

Which capacity or speed version should I choose for a Synology FS3400, FS3410 or FS3600?

This 128 GB (4 × 32 GB) DDR4 2666 kit matches the Synology part numbers D4RD-2666-32G and D4ER01-32G and is the correct upgrade for those FlashStation models.

What does the 2666 MHz rating mean once the memory is installed in a server?

The modules run at 2666 MHz (PC4-21300) with CL19 latency at 1.2 V. They will also operate at 2133 MHz or 2400 MHz if the system bus requires a lower speed.

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