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Two green DDR4 ECC registered RDIMM modules without heat spreaders

OWC

OWC 64GB (2x32GB) DDR4 2666 ECC Registered RDIMM for Synology Flashstation SA6400 Server RAM

SKU CH-VW43-QNPF8

64 GB dual-channel DDR4-2666 ECC registered RDIMM kit for Synology FlashStation SA6400 NAS servers

  • Capacity64GB (2 x 32GB)
  • Type288-Pin DDR4 SDRAM
  • SpeedDDR4 2666 (PC4 21300)
  • CAS LatencyCL19
  • Voltage1.2V
  • ECCYes

Capacity 64GB (2 x 32GB)

  • 64 GB dual-channel kit expands Synology SA6400 memory capacity
  • ECC registered DDR4 2666 protects data integrity in server workloads
  • JEDEC-standard 1.2 V modules lower power draw versus higher-voltage DIMMs
  • CL19 2Rx4 288-pin RDIMMs install directly into SA6400 slots
  • Backward compatible with 2133 MHz and 2400 MHz systems

64GB DDR4 ECC Registered Kit

This 64GB kit contains two 32GB DDR4 2666MHz ECC Registered RDIMMs built for the Synology FlashStation SA6400. It targets server and NAS administrators who need error-correcting registered memory to maintain data integrity in multi-user storage workloads.

Installation notes and common issues

Modules install into standard 288-pin DDR4 slots; the registered buffer adds a clock cycle so the memory controller must support registered DIMMs. Mixing these with unbuffered or load-reduced ECC modules will prevent the system from booting, and desktop platforms that lack registered support will not recognise the kit.

DDR4 2666 practical limits

The kit runs at 1.2V with CL19 timings and is backward compatible with 2133MHz and 2400MHz bus speeds, so it will down-clock automatically in slower slots. Maximum throughput is bounded by the DDR4 2666 standard, and total capacity cannot exceed the SA6400's supported memory ceiling.

Points forts

  • 64 GB dual-channel kit expands Synology SA6400 memory capacity
  • ECC registered DDR4 2666 protects data integrity in server workloads
  • JEDEC-standard 1.2 V modules lower power draw versus higher-voltage DIMMs
  • CL19 2Rx4 288-pin RDIMMs install directly into SA6400 slots
  • Backward compatible with 2133 MHz and 2400 MHz systems

Caractéristiques

BrandOWC
Part Number2R6D42R4064P
Capacity64GB (2 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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Questions sur cet article

How do I confirm the 64GB kit is running at the rated DDR4 2666 speed after installation?

Open the Synology DSM Resource Monitor and verify the installed memory shows 64GB at 2666MHz with ECC registered status.

What comes in the box and do I need any extra parts for the SA6400?

The box contains two 32GB 288-pin DDR4 ECC registered DIMMs (part 2R6D42R4064P); no additional components are required for the Flashstation SA6400.

Why choose this 64GB dual-channel kit over a single 32GB module?

The kit provides 64GB total capacity in a matched pair for dual-channel operation, using 2Rx4 registered ECC DIMMs at 1.2V that are validated for the SA6400.

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