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Green rectangular DDR4 SODIMM module with black memory chips and gold edge connector

NEMIX RAM

NEMIX RAM 16GB DDR4 2666 ECC SODIMM Synology memory upgrade

SKU CH-ADZ8-10GHH

16 GB DDR4 2666 ECC SODIMM module adds error-correcting memory to compatible Synology NAS systems

  • 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 in Synology NAS
  • 16GB capacity expands memory for heavier workloads
  • 2666MHz DDR4 speed matches system specification
  • 2V operation keeps power draw low
  • 260-pin SODIMM fits compatible Synology slots

Synology DDR4 2666 ECC SODIMM

This 16 GB DDR4 2666 module brings ECC protection to compatible Synology NAS units. It runs at 1.2 V with CL19 timing and uses a 260-pin unbuffered SODIMM form factor. Major OEM chips from Samsung, Micron or Hynix are tested under load before shipping.

NAS owners needing single-slot 16 GB ECC

The single-rank 2Rx8 design fits one slot, so systems with only one free socket can reach 16 GB without pairing modules. Builders who need higher total capacity or registered DIMM support should look at something else, as this kit provides only one unbuffered stick.

No extra accessories or software included

The package contains only the memory module itself. There are no heat spreaders, tools or configuration utilities to install. Compatibility is validated for the listed Synology platforms, so the module works immediately after seating it in the slot.

How it compares

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

Price $124.99
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 $7.81 per GB
Typical for this category: the median of 20,941 items is $8.19 per GB.

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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

Which Synology NAS models accept this 16GB DDR4 2666 ECC SODIMM?

This module is designed for Synology systems that support DDR4 2666 ECC unbuffered SODIMMs; check your NAS manual for the exact model list.

Can I add this 2Rx8 CL19 stick to a slot that already holds a 1Rx8 DDR4 2666 module?

Mixing ranks is often possible but the system will run both sticks at the lowest common speed and latency; verify with the NAS vendor.

How do I confirm the 16GB 2666 ECC module is recognised after installation?

Power on the NAS, open the web interface and view the memory section in System Information to see the new 16GB capacity and ECC status.

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