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Four green DDR4 RDIMM modules with gold contacts and black chips, no heat spreader

OWC

OWC 64GB (4x16GB) DDR4 2666 ECC Registered RDIMM server RAM

SKU CH-WGHA-A3JFE

A 64 GB DDR4 2666 ECC registered RDIMM kit of four 16 GB modules for Synology SA3400, SA410, SA3600 and SA3610 NAS systems

  • Capacity64GB (4 x 16GB)
  • Type288-Pin DDR4 SDRAM
  • SpeedDDR4 2666 (PC4 21300)
  • CAS LatencyCL19
  • Voltage1.2V
  • ECCYes

Capacity 64GB (4 x 16GB)

Rank 2Rx4

  • ECC registered design protects data integrity in servers
  • 64GB kit with four 16GB modules expands NAS capacity
  • DDR4 2666 CL19 at 1.2V matches OEM specifications
  • JEDEC and RoHS compliant for warranty-safe upgrades
  • Backward compatible with 2133MHz and 2400MHz systems

64 GB Registered DDR4 Kit

This OWC kit supplies 64 GB of DDR4 2666 ECC registered memory in four 16 GB modules. It targets administrators upgrading Synology NAS models SA3400, SA410, SA3600 and SA3610 or comparable servers and workstations. The registered design and ECC function make it unsuitable for standard desktop platforms.

Replaces Slower DDR4 Modules

The kit replaces existing DDR4 2133 or 2400 memory and runs at the higher 2666 MT/s rate while keeping CL19 latency and 1.2 V operation. The jump is worth it when the platform supports the faster JEDEC speed and the workload benefits from the extra bandwidth. Buyers who need unbuffered or load-reduced DIMMs cannot use this product.

Sustained Operation at 2666 MT/s

Each module uses a 2Rx4 organisation and operates without a heat spreader at the rated 1.2 V. Under continuous load the registered buffer helps maintain signal integrity across all four slots. The JEDEC-compliant design ensures stable throughput during extended server or NAS tasks.

Privalumai

  • ECC registered design protects data integrity in servers
  • 64GB kit with four 16GB modules expands NAS capacity
  • DDR4 2666 CL19 at 1.2V matches OEM specifications
  • JEDEC and RoHS compliant for warranty-safe upgrades
  • Backward compatible with 2133MHz and 2400MHz systems

Specifikacijos

BrandOWC
Part Number2R6D42R4064S
Capacity64GB (4 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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Does the 288-pin DDR4 RDIMM fit my Synology SA3600 memory slots?

Yes, the kit uses 288-pin DDR4 RDIMM modules that match the slot layout of Synology SA3400, SA410, SA3600 and SA3610 NAS units.

How do I install the four 16 GB sticks in dual-channel mode, and what step is often missed?

Populate the paired DIMM slots indicated in the NAS manual so each channel receives one module; the step often missed is seating both ends until the retention clips click.

Will the registered ECC modules need any firmware updates or periodic replacement?

No firmware updates are required for the memory itself; the modules are rated for continuous server operation and only need replacement if a hardware error appears.

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