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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

  • Total capacity8 GB
  • Rated speedDDR4 2666 (PC4 21300)
  • CAS latencyCL19
  • Rated voltage1.2 V
  • Buffer typeUnbuffered
  • Memory rank1Rx8

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.

How it compares

Measured against everything we stock in Model-Specific Memory Upgrades, at today’s prices. Recalculated every night.

Price $61.99
Cheaper than about 75% of the 21,161 comparable items (median $397.99).
Total capacity 8 GB
Lower than about 80% of the 20,941 comparable items (median 32 GB).
Price per GB $7.75 per GB
Typical for this category: the median of 20,941 items is $8.19 per GB.

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

Specifications

Product
Brand nameOWC
Part number2E6D41R808 GB
Total capacity8 GB
Product type288-Pin DDR4 ECC UDIMM
Performance
Rated speedDDR4 2666 (PC4 21300)
Memory
CAS latencyCL19
ECC supportYes
Buffer typeUnbuffered
Memory rank1Rx8
Heat spreaderNo
Power
Rated voltage1.2 V
Compatibility
Compatible systemsSynology RackstationRS1619xs+
Synology RackstationRS2818RP+

Other versions of this model

5 more in the same range

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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