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Green printed circuit board with black memory chips and gold edge connectors

OWC

OWC 16GB DDR4 2666MHz ECC SODIMM for Synology DS1819+ DS1821+

SKU CH-DTWX-1JJX3

16 GB DDR4 2666 MHz ECC SODIMM upgrades Synology DS1819+ and DS1821+ NAS with 2Rx8 CL19 1.2 V reliability

  • Capacity16GB (1 x 16GB)
  • Type260-Pin DDR4 ECC SODIMM
  • SpeedDDR4 2666 (PC4 21300)
  • CAS LatencyCL19
  • Voltage1.2V
  • ECCYes
  • 16GB DDR4 ECC SODIMM adds capacity for Synology DS1819+ and DS1821+
  • 2666MHz PC4-21300 CL19 speed matches NAS specifications
  • 2V low-voltage operation reduces power draw
  • 2Rx8 260-pin unbuffered design fits supported DiskStation slots
  • JEDEC and RoHS compliant for warranty-safe upgrade

16GB DDR4 ECC SODIMM for Synology DS1819+

This single 16GB module is built for Synology DiskStation DS1819+ and DS1821+ NAS units. It runs at 2666MHz with CL19 latency and uses ECC unbuffered technology for data integrity. The 260-pin DDR4 form factor fits the supported systems directly. Buyers needing more than 16GB per slot or non-ECC memory should look elsewhere.

Thermals noise and power draw

Operating at 1.2V, the module draws minimal power and produces little heat without a heat spreader. Passive cooling inside the NAS chassis is sufficient for normal workloads. The low voltage keeps system fan speeds quiet during typical file serving and backup tasks. No active cooling or extra airflow is required for this component.

Build quality and daily use

JEDEC and RoHS compliance ensures a warranty-safe upgrade that meets OEM specifications. The 2Rx8 rank layout works with the native memory controller of the compatible models. Backward compatibility with 2400MHz and 2133MHz systems allows flexibility if moved to older hardware. Installation is a straightforward DIY step using the SODIMM slot.

Points forts

  • 16GB DDR4 ECC SODIMM adds capacity for Synology DS1819+ and DS1821+
  • 2666MHz PC4-21300 CL19 speed matches NAS specifications
  • 2V low-voltage operation reduces power draw
  • 2Rx8 260-pin unbuffered design fits supported DiskStation slots
  • JEDEC and RoHS compliant for warranty-safe upgrade

Caractéristiques

BrandOWC
Part Number2C6D42R816GB
Capacity16GB (1 x 16GB)
Type260-Pin DDR4 ECC SODIMM
SpeedDDR4 2666 (PC4 21300)
CAS LatencyCL19
Voltage1.2V
ECCYes
Buffered/RegisteredUnbuffered
Rank2Rx8
Heat SpreaderNo
Compatible SystemSynology DiskStationDS1819+
Synology DiskStationDS1821+

Questions sur cet article

How do I install the 260-pin DDR4 ECC SODIMM into my DS1819+ and which step is often missed?

Power off the NAS, unplug it, open the chassis, align the notch on the 260-pin module with the slot key, press firmly until the side clips click, then reassemble; the step most people miss is fully seating both clips so the module does not sit slightly tilted.

What maintenance or replacement will this 16GB ECC module need over time?

No scheduled maintenance is required; the module has no heat spreader or moving parts, so replacement is only necessary if a memory error appears or you later expand beyond the NAS maximum supported capacity.

What limit appears first when the DS1821+ runs sustained workloads with this CL19 2666MHz memory?

The memory controller in the DS1821+ caps the data rate at 2666MHz, so sustained throughput is limited by that ceiling rather than the module's own CL19 timing or 1.2V operation.

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