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Green circuit board with gold edge connectors and black memory chips

OWC

OWC 16GB DDR4 2666MHz ECC UDIMM CL19 1.2V 2Rx8 memory upgrade

SKU CH-GDFF-7005W

Adds 16 GB of DDR4 2666 ECC memory to a Synology RS3618xs NAS for error-corrected multitasking

  • Capacity16GB (1 x 16GB)
  • Type288-Pin DDR4 ECC UDIMM
  • SpeedDDR4 2666 (PC4 21300)
  • CAS LatencyCL19
  • Voltage1.2V
  • ECCYes
  • 16GB DDR4 ECC UDIMM boosts NAS reliability with error correction
  • 2666MHz CL19 speed accelerates Synology RS3618xs workloads
  • 2V low voltage reduces system power draw
  • 288-pin unbuffered design fits standard DDR4 slots directly
  • JEDEC and RoHS compliant module ensures warranty-safe upgrade

16GB DDR4 ECC UDIMM for Synology RS3618xs

This single 16GB DDR4 2666MHz module is built to the JEDEC PC4-21300 standard with CL19 latency and 1.2V operation. It carries ECC protection and an unbuffered 2Rx8 layout on a 288-pin PCB, matching the memory architecture specified for the Synology RackStation RS3618xs NAS.

Suits RS3618xs owners adding ECC capacity.

The module targets administrators expanding a Synology RS3618xs with validated ECC memory. Systems that require registered DIMMs, non-ECC consumer RAM, or speeds above 2666MHz will not be compatible with this specific part.

Straightforward DIMM swap.

Installation follows the standard 288-pin UDIMM procedure: power down, open the chassis, align the notch, and press until the latches click. The main risk is exceeding the RS3618xs maximum supported capacity or mixing ranks in a way the firmware rejects, so consult the NAS memory guide before adding the module.

Puntos fuertes

  • 16GB DDR4 ECC UDIMM boosts NAS reliability with error correction
  • 2666MHz CL19 speed accelerates Synology RS3618xs workloads
  • 2V low voltage reduces system power draw
  • 288-pin unbuffered design fits standard DDR4 slots directly
  • JEDEC and RoHS compliant module ensures warranty-safe upgrade

Especificaciones

BrandOWC
Part Number2E6D42R816GB
Capacity16GB (1 x 16GB)
Type288-Pin DDR4 ECC UDIMM
SpeedDDR4 2666 (PC4 21300)
CAS LatencyCL19
Voltage1.2V
ECCYes
Buffered/RegisteredUnbuffered
Rank2Rx8
Heat SpreaderNo
Compatible SystemSynology RackstationRS3618xs

Preguntas sobre este artículo

What type of motherboard slot does the 288-pin DDR4 ECC UDIMM require?

The module fits a standard 288-pin DDR4 DIMM slot on a motherboard that supports ECC unbuffered memory.

Will the 2666MHz CL19 module run correctly if I keep existing 2133MHz or 2400MHz sticks in the other slots?

Yes, it is backward compatible with 2133MHz and 2400MHz speeds and will downclock to match the slowest installed module.

How can I verify the 16GB 2Rx8 stick is detected at 2666MHz with ECC active after installation?

Check the system BIOS or DSM information page; it should show 16GB total capacity, 2666MHz speed, and ECC enabled status.

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