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Green circuit board with black memory chips and gold edge connectors

NEMIX RAM

NEMIX RAM 8GB DDR4 2666 ECC SODIMM Synology memory upgrade

SKU CH-0WBV-WHYJ5

Adds 8 GB of DDR4 ECC SODIMM memory to compatible Synology NAS units at 2666 MT/s with CL19 latency

  • Total capacity8 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
  • 8 GB DDR4 2666 MHz expands memory capacity
  • 2 V operation reduces power draw and heat
  • 260-pin SODIMM form factor fits compatible Synology bays
  • CL19 latency with 1Rx8 organisation delivers stable throughput

Synology NAS memory upgrade

This 8 GB DDR4 2666 ECC SODIMM is built for Synology NAS units that require unbuffered error-correcting memory. It targets administrators who need to expand capacity for virtualisation, container workloads or large file caches without sacrificing data integrity.

Replacing non-ECC or lower-capacity sticks

The module substitutes standard non-ECC SODIMMs or smaller ECC modules when the workload demands bit-error protection and the chassis has a free 260-pin slot. The jump is worth it when ZFS scrub jobs, Docker containers or VM storage push the existing memory into constant swapping.

DDR4 SODIMM electrical and physical limits

The 1.2 V unbuffered design relies on the memory controller for signal integrity, so trace length and slot count on the mainboard constrain maximum stable frequency. CL19 timing at 2666 MT/s is the rated operating point; tighter latencies or higher speeds are not supported by this part.

How it compares

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

Price $59.99
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 $7.50 per GB
Cheaper than about 54% 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 numberMSE21300-818K1
Total capacity8 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 rank1Rx8
Power
Rated voltage1.2 V
Compatibility
Compatible systemsSynology
In the box
Included items8 GB (1 × 8 GB) DDR4 2666 MHz PC4-21300 1Rx8 1.2 V CL19 260-PIN ECC Unbuffered SODIMM

Questions about this item

Will the 260-pin DDR4 SODIMM fit my Synology NAS memory slot?

Yes, the module uses the standard 260-pin DDR4 SODIMM form factor designed for compatible Synology systems.

Do I need to configure anything in the BIOS after inserting the CL19 ECC SODIMM?

No configuration is required; the unbuffered ECC module is detected automatically at 2666 MHz with CL19 timings.

How long will the Samsung, Micron or Hynix chips on this 1Rx8 module last under constant NAS workloads?

The major OEM chips are stress-tested for reliability and covered by a lifetime replacement warranty.

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