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Green rectangular circuit board with black memory chips and gold edge connector

NEMIX RAM

NEMIX RAM 16GB DDR4 2666 ECC Unbuffered SODIMM CL19 2Rx8 Synology Compatible memory upgrade

SKU CH-C0Y6-SFP1W

16 GB DDR4 2666 ECC unbuffered SODIMM with CL19 latency for Synology NAS upgrades

  • Total capacity16 GB
  • Rated speedDDR4 2666 (PC4 21300)
  • ChipsetMajor OEM Samsung, Micron, Hynix
  • CAS latencyCL19
  • Buffer typeUnbuffered
  • Rated voltage1.2 V
  • ECC protection guards data integrity on Synology NAS
  • 16 GB DDR4 2666 MHz expands system memory capacity
  • CL19 latency at 1.2 V delivers efficient operation
  • 2Rx8 260-pin unbuffered SODIMM fits compatible Synology bays
  • Major OEM chips ensure reliable performance under load

Synology DDR4 2666 ECC SODIMM

This NEMIX RAM module delivers 16 GB of DDR4 2666 ECC unbuffered memory in a 260-pin SODIMM form factor. It runs at 1.20 V with CL19 latency and a 2Rx8 rank structure using major OEM DRAM chips. The stick is validated for Synology DiskStation and RackStation NAS devices.

Suited for Synology NAS owners needing ECC

It fits users who want error-correcting memory to guard data integrity in a Synology NAS. Builders requiring non-ECC laptop SODIMMs, registered DIMMs, higher speeds, or larger single-module capacities cannot use this part.

260-pin DDR4 ECC unbuffered SODIMM

The 260-pin DDR4 ECC unbuffered SODIMM interface is the single specification that decides compatibility. Only systems accepting this exact module type and voltage will recognise the upgrade.

How it compares

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

Price $123.99
Cheaper than about 65% of the 21,161 comparable items (median $397.99).
Total capacity 16 GB
Lower than about 70% 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 nameNEMIX RAM
Product lineSynology Compatible Series NAS Memory
Model nameSynology DDR4 2666 MHz ECC Unbuffered SODIMM
Part numberMSE21300-628K1
Total capacity16 GB
Product type260-PIN DDR4 ECC SODIMM
Performance
Rated speedDDR4 2666 (PC4 21300)
Processor
ChipsetMajor OEM Samsung, Micron, Hynix
Memory
CAS latencyCL19
ECC supportYes
Buffer typeUnbuffered
Heat spreaderNo
Memory rank2Rx8
Power
Rated voltage1.2 V
Compatibility
Compatible systemsSynology
In the box
Included items16 GB (1 × 16 GB) DDR4 2666 MHz PC4-21300 2Rx8 1.2 V CL19 260-PIN ECC Unbuffered SODIMM

Questions about this item

Does this 260-pin DDR4 SODIMM fit the memory slot in my Synology DiskStation or RackStation?

Yes, the module is a 260-pin DDR4 ECC unbuffered SODIMM built for Synology NAS devices that accept DDR4 2666 memory.

What is the correct way to seat the module so the ECC function works?

Power off the NAS, open the chassis, align the notch on the 260-pin edge connector with the slot key, press firmly until both side clips click, then power on and verify the new capacity in DSM.

Will the Samsung, Micron or Hynix chips on this 2Rx8 module need replacement during the NAS lifetime?

The memory uses major-brand DRAM rated for continuous operation; under normal NAS workloads no chip replacement is expected for the life of the system.

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