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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

  • Capacity8GB
  • SpeedDDR4 2666 (PC4 21300)
  • ECCYes
  • Buffered/RegisteredUnbuffered
  • ChipsetMajor OEM Samsung, Micron, Hynix
  • Voltage1.20V
  • 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.

Highlights

  • 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

Specifications

BrandNEMIX RAM
SeriesSynology Compatible Series NAS Memory
ModelSynology DDR4 2666MHZ ECC Unbuffered SODIMM
Part NumberMSE21300-818K1
Capacity8GB
SpeedDDR4 2666 (PC4 21300)
ECCYes
Buffered/RegisteredUnbuffered
ChipsetMajor OEM Samsung, Micron, Hynix
Voltage1.20V
Compatible SystemSynology
CAS LatencyCL19
Heat SpreaderNo
Type260-PIN DDR4 ECC SODIMM
Rank1Rx8
FeaturesDDR4 ECC Unbuffered SODIMM Motherboard Compatible
Package Content8GB (1X8GB) DDR4 2666MHZ PC4-21300 1Rx8 1.2V 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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