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Four green DDR4 UDIMM sticks in a clear plastic tray

NEMIX RAM

NEMIX RAM 64GB (4x16GB) DDR4 2666 ECC UDIMM D4EC-2666-16G memory upgrade

SKU CH-Z8W1-H379E

Four 16 GB DDR4 ECC UDIMM modules running at 2666 MHz with CL19 latency and 1.2 V for Synology NAS systems

  • Capacity64GB (4 x 16GB)
  • SpeedDDR4 2666 (PC4 21300)
  • ECCYes
  • Buffered/RegisteredUnbuffered
  • ChipsetMajor OEM Samsung, Micron, Hynix
  • Voltage1.20V
  • ECC protection safeguards data integrity in Synology NAS
  • 64GB kit expands capacity for demanding workloads
  • DDR4 2666 speed matches system specifications
  • 2V operation reduces power consumption
  • 288-pin UDIMM form factor fits compatible Synology models

Synology NAS memory kit

This 64GB kit contains four 16GB DDR4 2666 modules built for Synology NAS units. ECC unbuffered UDIMMs protect data integrity in always-on storage workloads. The kit targets administrators who need validated capacity expansion without mixing modules.

Low-voltage DDR4 operation

Each module runs at 1.2V with CL19 timings and a 2Rx8 organisation. The standard voltage keeps power draw modest inside dense NAS chassis. No heat spreaders are fitted, so airflow from the system fans handles cooling directly.

Matched four-module kit

The package delivers four identical 288-pin DIMMs from major OEM DRAM suppliers. Pre-matched sticks remove the guesswork of populating all slots simultaneously. Installers simply seat the modules and let the NAS firmware initialise the full 64GB array.

Points forts

  • ECC protection safeguards data integrity in Synology NAS
  • 64GB kit expands capacity for demanding workloads
  • DDR4 2666 speed matches system specifications
  • 2V operation reduces power consumption
  • 288-pin UDIMM form factor fits compatible Synology models

Caractéristiques

BrandNEMIX RAM
SeriesSynology Compatible Series NAS Memory
ModelSynology DDR4 2666MHZ ECC Unbuffered UDIMM
Part NumberME21300-628K4
Capacity64GB (4 x 16GB)
SpeedDDR4 2666 (PC4 21300)
ECCYes
Buffered/RegisteredUnbuffered
ChipsetMajor OEM Samsung, Micron, Hynix
Voltage1.20V
Compatible SystemSynology
CAS LatencyCL19
Heat SpreaderNo
Type288-Pin DDR4 ECC UDIMM
Rank2Rx8
FeaturesDDR4 ECC Unbuffered UDIMM Motherboard Compatible
Package Content64GB (4X16GB) DDR4 2666MHZ PC4-21300 2Rx8 1.2V CL19 288-PIN ECC Unbuffered UDIMM KIT

Questions sur cet article

How do I install the 288-pin DDR4 ECC UDIMM modules in my Synology NAS, and what step is often missed?

Power off the NAS, open the chassis, align each module's notch with the slot key, press firmly until the retention clips click, then verify all four 16GB sticks are recognised in DSM before closing the case.

What maintenance or replacement will the 64GB kit need over time?

The modules have no heat spreaders and run at 1.20V; keep the NAS vents clear and monitor DSM memory health alerts, replacing any stick that reports correctable ECC errors during scrubbing.

What limit appears first when the 2666MHz CL19 2Rx8 kit runs sustained workloads?

The CL19 latency at 2666MHz sets the throughput ceiling; under continuous heavy load the memory controller hits that timing bound before thermal throttling becomes a factor.

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