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Green rectangular memory module with gold edge connectors and black chips, no heat spreader

OWC

OWC 8GB DDR4 2666 CL19 ECC UDIMM 1Rx8 1.2V 288-Pin for Synology RS1619xs+ RS2818RP+

SKU CH-WTRM-SQVFD

8GB DDR4 ECC UDIMM at 2666MHz CL19 1.2V validated for Synology RS1619xs+ and RS2818RP+ NAS systems

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

Capacity 8GB

  • ECC protection guards data integrity on Synology RS1619xs+ and RS2818RP+
  • JEDEC-standard DDR4 2666 MHz CL19 runs at low 1.2 V
  • Unbuffered 288-pin UDIMM installs easily in compatible NAS bays
  • Single 8 GB 1Rx8 module adds capacity without mixing ranks
  • Backward compatible with 2133 MHz and 2400 MHz systems

Targeted NAS Memory Upgrade

This 8 GB DDR4 ECC UDIMM is built for Synology RackStation RS1619xs+ and RS2818RP+ units that require JEDEC-standard 2666 MHz memory with error correction. It suits administrators who need to expand capacity in validated 1U and 2U rack appliances without changing voltage or form factor.

Build Integration

The module uses a standard 288-pin unbuffered layout at 1.2 V, so it fits directly into the DIMM slots on the listed RackStation models and runs alongside existing 2133 MHz or 2400 MHz sticks at the lower common speed. ECC support protects stored data from single-bit errors, while the single-rank 1Rx8 organisation leaves additional slots free for further expansion.

Sustained Operation

Rated at CL19 latency and PC4-21300 bandwidth, the DIMM maintains specified timings during continuous file-serving, backup and virtualization workloads typical of NAS environments. JEDEC and RoHS compliance ensures stable voltage regulation and thermal behaviour over long duty cycles, and the absence of a heat spreader keeps the profile low for dense rack chassis airflow.

Highlights

  • ECC protection guards data integrity on Synology RS1619xs+ and RS2818RP+
  • JEDEC-standard DDR4 2666 MHz CL19 runs at low 1.2 V
  • Unbuffered 288-pin UDIMM installs easily in compatible NAS bays
  • Single 8 GB 1Rx8 module adds capacity without mixing ranks
  • Backward compatible with 2133 MHz and 2400 MHz systems

Specifications

BrandOWC
Part Number2E6D41R808GB
Capacity8GB
Type288-Pin DDR4 ECC UDIMM
SpeedDDR4 2666 (PC4 21300)
CAS LatencyCL19
Voltage1.2V
ECCYes
Buffered/RegisteredUnbuffered
Rank1Rx8
Heat SpreaderNo
Compatible SystemSynology RackstationRS1619xs+
Synology RackstationRS2818RP+

Other versions of this model

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Questions about this item

Will the CL19 latency limit throughput when the NAS runs sustained workloads?

CL19 is the rated CAS latency at 2666 MHz; the module follows JEDEC timings so latency stays consistent under load.

Does the stick run hot or draw extra power during all-day operation?

The 1.2 V DDR4 design has no heat spreader and meets standard JEDEC power limits for continuous use.

Which Synology models must I already own for this 8 GB DIMM to work?

It is validated for Synology RackStation RS1619xs+ and RS2818RP+ systems.

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