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Green rectangular DDR4 288-pin RDIMM with black chips, no heat spreader

OWC

OWC 8GB DDR4 2666 ECC Registered RDIMM server RAM

SKU CH-Y0Q7-F9E0K

An 8 GB DDR4 2666 ECC registered RDIMM for Synology FS3400, FS3410 and FS3600 NAS systems

  • Capacity8GB
  • Type288-Pin DDR4 SDRAM
  • SpeedDDR4 2666 (PC4 21300)
  • CAS LatencyCL19
  • Voltage1.2V
  • ECCYes

Capacity 8GB

Rank 1Rx4

  • ECC registered design protects data integrity in servers
  • DDR4 2666 MHz CL19 speed matches system timing
  • 2 V operation reduces power draw per module
  • Single 8 GB 1Rx4 rank fits one 288-pin slot
  • Backward compatible with 2133 MHz and 2400 MHz systems

Target systems

This 8GB DDR4 2666 ECC Registered RDIMM is built for servers, workstations and NAS units that require registered error-correcting memory. It replaces Synology D4RD-2666-8G and D4ER01-8G modules in FlashStation FS3400, FS3410 and FS3600 systems. The module runs at PC4-21300 speed with CL19 latency at 1.2V.

Compatibility guidance

It suits administrators upgrading compatible rackmount or tower servers that accept 288-pin registered DIMMs. It will not work in standard desktop PCs, laptops or consumer motherboards that only support unbuffered memory, and it cannot be mixed with load-reduced or unbuffered ECC modules in the same platform.

Deciding specification

The registered ECC design with 1Rx4 organisation is the single factor that determines fit; only systems explicitly qualified for registered DDR4 ECC RDIMMs can use this module. Backward compatibility with 2133MHz and 2400MHz buses allows deployment in older slots without changing the memory type.

Highlights

  • ECC registered design protects data integrity in servers
  • DDR4 2666 MHz CL19 speed matches system timing
  • 2 V operation reduces power draw per module
  • Single 8 GB 1Rx4 rank fits one 288-pin slot
  • Backward compatible with 2133 MHz and 2400 MHz systems

Specifications

BrandOWC
Part Number2R6D41R408GB
Capacity8GB
Type288-Pin DDR4 SDRAM
SpeedDDR4 2666 (PC4 21300)
CAS LatencyCL19
Voltage1.2V
ECCYes
Buffered/RegisteredRegistered
Rank1Rx4
Heat SpreaderNo

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Questions about this item

Will this 2666 MHz DDR4 module run at its rated speed in a Synology FS3600?

The FS3600 memory controller operates at 2666 MHz, so the module will run at its full PC4-21300 data rate without downclocking.

Does the registered ECC design limit which DIMM slots I can populate on a Synology FS3410?

Registered ECC modules must be used in registered-compatible slots; the FS3410 only accepts registered DIMMs, so any populated slot will work.

Will the 288-pin RDIMM fit inside the Synology FS3400 chassis without a low-profile bracket?

The module uses the standard 288-pin RDIMM form factor with no heat spreader, matching the FS3400's vertical DIMM sockets exactly.

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