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Green bare circuit board SODIMM module with black memory chips and gold edge connector

NEMIX RAM

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

SKU CH-KZKT-5PKPX

16 GB DDR4 2666 MHz ECC unbuffered SODIMM with CL19 latency for Synology RackStation DS1823xs+

  • 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 NAS workloads
  • DDR4 2666 speed matches Synology DS1823xs+ specifications
  • 16 GB single module expands capacity without empty slots
  • 2 V operation keeps power draw low in compact enclosures
  • 2Rx8 rank organisation optimises bandwidth for multi-threaded tasks

Synology DS1823xs+ NAS upgrade

This 16 GB DDR4 2666 SODIMM adds ECC unbuffered memory to the Synology Rackstation DS1823xs+. The module targets IT professionals and enthusiasts who need verified compatibility for mission-critical storage workloads. It installs in a single 260-pin slot to expand capacity without mixing ranks. The 2Rx8 organisation suits the platform's memory controller.

Low-voltage operation and passive cooling

Running at 1.20 V, the module draws minimal power and produces little heat, so no heat spreader is required. Silent passive operation keeps acoustic levels unchanged in rackmount or desktop NAS deployments. CL19 latency at 2666 MT/s delivers stable throughput for sustained file-serving and virtualisation tasks. ECC protection corrects single-bit errors to maintain data integrity under load.

Single-module flexibility for dense chassis

The 1x16 GB format leaves additional SODIMM slots free for future expansion within the system's maximum capacity. No extra cables, brackets or airflow adjustments are needed. Builders who need registered DIMMs, higher frequencies or non-ECC memory must select a different module. Compatibility is validated for the listed Synology platform only.

How it compares

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

Price $110.99
Cheaper than about 66% 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 $6.94 per GB
Cheaper than about 58% of the 20,941 comparable items (median $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

How do I install the 260-pin DDR4 SODIMM in my Synology Rackstation DS1823xs+ and what step is often missed?

Power off the NAS, remove the chassis cover, insert the module at an angle into the slot until it clicks, then secure the retaining clips; the step often missed is fully seating both clips so the ECC circuitry makes proper contact.

What maintenance or replacement will this 16GB ECC unbuffered 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 capacity must be increased beyond 16GB.

What limit appears first when this CL19 2Rx8 kit runs sustained workloads?

The CAS latency of 19 cycles at 2666 MT/s sets the timing ceiling, so sustained throughput is bounded by that latency before thermal or voltage constraints become factors.

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