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Two green DDR4 RDIMM modules, 288-pin, no heat spreader

OWC

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

SKU CH-7N34-KG7DZ

32 GB dual-channel DDR4-2666 ECC registered RDIMM kit for compatible servers and NAS units

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

Capacity 32GB (2 x 16GB)

Rank 2Rx4

  • ECC registered design protects data integrity in servers and workstations
  • 32GB dual-channel kit (2 x 16GB) expands memory capacity for demanding workloads
  • DDR4 2666 CL19 at 1.2V delivers JEDEC-standard speed and efficiency
  • Compatible with Synology FlashStation FS3400, FS3410 and FS3600 NAS systems
  • Backward compatible with 2133MHz and 2400MHz platforms for flexible deployment

Server ECC Registered Upgrade

This OWC kit provides 32GB of DDR4 2666 ECC Registered memory in a dual-channel 2x16GB configuration. It targets administrators upgrading Synology FlashStation FS3400, FS3410 or FS3600 units and other compatible server or workstation platforms that require registered DIMMs.

Straightforward DIMM Installation

The 288-pin modules seat in standard DDR4 RDIMM slots without tools or heat spreaders to remove. Systems that expect unbuffered or load-reduced ECC memory will not accept these registered sticks, so verifying the motherboard manual before purchase avoids a mismatch.

Steady Throughput Under Load

Rated at PC4-21300 with CL19 timings at 1.2V, the modules maintain spec-defined bandwidth during extended workloads. Backward compatibility with 2133MHz and 2400MHz buses allows deployment in mixed-speed chassis without down-clocking surprises.

Highlights

  • ECC registered design protects data integrity in servers and workstations
  • 32GB dual-channel kit (2 x 16GB) expands memory capacity for demanding workloads
  • DDR4 2666 CL19 at 1.2V delivers JEDEC-standard speed and efficiency
  • Compatible with Synology FlashStation FS3400, FS3410 and FS3600 NAS systems
  • Backward compatible with 2133MHz and 2400MHz platforms for flexible deployment

Specifications

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

Other versions of this model

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Same family, different memory, cooler or clock — compare before you commit.

Questions about this item

How can I verify the 32GB kit is running at 2666 MT/s with ECC after installation?

Check the BIOS or UEFI memory information screen — it should show 32GB total, 2666 MT/s speed, CL19 timings and ECC Registered status for each 16GB module.

What comes in the box and what must be purchased separately?

The box contains two 16GB DDR4 2666 ECC Registered RDIMM modules (part 2R6D42R4032P); no additional parts or cables are included.

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

This 32GB (2×16GB) DDR4 2666 CL19 kit matches the Synology D4RD-2666-16G and D4ER01-16G specs and is validated for FS3400, FS3410 and FS3600.

New to this? Buying memory and SSDs with crypto — what to check, what it costs to pay, and what is never asked for.

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