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Green circuit board with black chips, gold edge connector, no heat spreader

OWC

OWC 8GB DDR4 2666MHz CL19 ECC SODIMM DS3617xs II

SKU CH-49EX-RCEAX

Adds 8 GB of DDR4 ECC memory to Synology DS3617xs and DS3617xsII NAS systems at 2666 MHz CL19

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

Capacity 8GB

  • 8GB capacity expands NAS multitasking headroom
  • DDR4 2666MHz CL19 matches system memory speed
  • ECC protection guards data integrity in NAS
  • 2V low voltage reduces power draw
  • 260-pin SODIMM fits Synology DS3617xs and DS3617xsII

8GB DDR4 ECC SODIMM for Synology DS3617xs Series

This module adds eight gigabytes of DDR4 ECC memory to Synology DiskStation DS3617xs and DS3617xsII NAS systems. It runs at 2666MHz with CL19 latency and operates at 1.2V. The unbuffered 260-pin SODIMM is designed for micro servers and network-attached storage appliances.

Tool-free slot access

Installation requires opening the NAS chassis and inserting the SODIMM into the available slot; no special tools are needed. The module is backward compatible with 2400MHz and 2133MHz bus speeds, so it will clock down automatically if the system runs at a lower frequency. Ensure the unit is powered off and disconnected before starting.

ECC unbuffered DDR4 2666MHz CL19 specification

The single rank 1Rx8 organisation with error-correcting code is the decisive factor for compatibility; the DS3617xs series requires ECC unbuffered DDR4 SODIMMs. Non-ECC or registered modules will not function correctly in these NAS platforms.

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 number2C6D41R808 GB
Total capacity8 GB
Product type260-Pin DDR4 ECC SODIMM
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 DiskStationDS3617xs
Synology DiskStationDS3617xsII

Other versions of this model

5 more in the same range

Questions about this item

How can I verify the OWC 8GB DDR4 2666MHz CL19 ECC SODIMM is working correctly after installing it in my Synology DS3617xs?

After installation, open the Synology DSM interface, go to the Info Center, and confirm the total memory shows the new 8GB capacity with ECC status active.

What is included with the OWC 8GB DDR4 2666MHz CL19 ECC SODIMM and what must be purchased separately?

The package contains a single 8GB DDR4 2666MHz CL19 ECC Unbuffered 260-pin SODIMM module. No tools, cables, or additional components are included.

Which capacity version of the OWC DDR4 2666MHz CL19 ECC SODIMM should I choose for my DS3617xsII?

This module provides 8GB capacity. Select the number of modules based on your NAS model's maximum supported memory and available SODIMM slots.

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