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Two green circuit boards with gold contacts and black chips, no heat spreader

OWC

OWC 32GB (2x16GB) DDR4 2666 ECC Registered RDIMM Synology SA6400 server RAM

SKU CH-9V2T-8J3XA

A 32 GB dual-channel kit of DDR4 2666 ECC registered RDIMM memory for Synology SA6400 servers

  • Capacity32GB (2 x 16GB)
  • Type288-Pin DDR4 SDRAM
  • SpeedDDR4 2666 (PC4 21300)
  • CAS LatencyCL19
  • Voltage1.2V
  • ECCYes

Capacity 32GB (2 x 16GB)

  • ECC registered design protects data integrity in Synology SA6400 servers
  • Dual-channel 32 GB kit (2 × 16 GB) doubles memory bandwidth
  • DDR4 2666 MHz CL19 at 1.2 V matches OEM specifications
  • JEDEC and RoHS compliant for warranty-safe upgrades
  • Backward compatible with 2133 MHz and 2400 MHz systems

ECC Registered DDR4 Kit for Synology SA6400

This 32GB dual-channel kit contains two 16GB DDR4 2666 modules built to PC4-21300 specification with CL19 latency. The registered ECC design targets the Synology SA6400 NAS and similar server or workstation platforms that require buffered memory with error correction.

288-pin registered DIMMs without heat spreaders

Each module uses a standard 288-pin DDR4 form factor and operates at 1.2V. The registered buffer reduces electrical load on the memory controller, allowing stable operation in multi-DIMM configurations, while the bare PCB fits tight server chassis where tall heat spreaders would interfere with airflow or adjacent slots.

DDR4 2666 with backward speed compatibility

The modules run at 2666MHz and will also operate at 2133MHz or 2400MHz if the system demands a lower data rate. They cannot be used in desktop boards that accept only unbuffered non-ECC memory, nor can they be mixed with load-reduced ECC modules in the same system.

Points forts

  • ECC registered design protects data integrity in Synology SA6400 servers
  • Dual-channel 32 GB kit (2 × 16 GB) doubles memory bandwidth
  • DDR4 2666 MHz CL19 at 1.2 V matches OEM specifications
  • JEDEC and RoHS compliant for warranty-safe upgrades
  • Backward compatible with 2133 MHz and 2400 MHz systems

Caractéristiques

BrandOWC
Part Number2R6D42R4032P
Capacity32GB (2 x 16GB)
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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Questions sur cet article

What speed does the DDR4 2666 PC4-21300 rating actually cap at in a Synology SA6400?

The kit runs at 2666 MHz (PC4-21300) with CL19 latency; the SA6400 memory controller will operate it at that rated speed.

Will these 288-pin ECC Registered DIMMs physically fit the SA6400 memory slots?

Yes — the SA6400 uses standard 288-pin DDR4 RDIMM slots, so the 288-pin registered modules seat directly without adapters.

How do I install the dual-channel kit correctly, and what step do people often miss?

Power off the NAS, open the chassis, insert both 16 GB modules into the paired channel slots until the ejector clips click, then power on and verify 32 GB in DSM.

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