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Green circuit board with black memory chips and gold edge connectors

NEMIX RAM

NEMIX RAM 16GB DDR4 2666 ECC Unbuffered SODIMM CL19 1.2V 260-PIN Synology DS1821+ memory upgrade

SKU CH-V685-7AGXB

16 GB DDR4 2666 ECC unbuffered SODIMM for Synology DS1821+ NAS upgrade

  • Capacity16GB
  • SpeedDDR4 2666 (PC4 21300)
  • ECCYes
  • Buffered/RegisteredUnbuffered
  • ChipsetMajor OEM Samsung, Micron, Hynix
  • Voltage1.20V
  • ECC protection guards data integrity with error correction
  • 16 GB capacity expands NAS storage for heavier workloads
  • 2666 MHz DDR4 speed matches Synology DS1821+ specifications
  • 2 V low voltage reduces power draw and heat
  • 260-pin SODIMM form factor fits directly into the NAS slot

Synology DS1821+ ECC SODIMM upgrade

This 16GB DDR4 2666 module is built specifically for the Synology DiskStation DS1821+. It uses ECC unbuffered chips to protect data integrity in a NAS environment. The 260-pin SODIMM form factor matches the system's memory slots exactly.

Single-module kit with major-brand ICs

The package contains one 16GB stick populated with Samsung, Micron or Hynix components. CL19 latency and 1.2V operation keep power draw low while maintaining stability. No heat spreader is fitted, which suits the tight drive-bay layout of the DS1821+.

Tool-free slot access with manual verification

Synology DS1821+ memory slots are reachable after removing the drive trays, so no special tools are required. The main risk is inserting the module at an angle before the notch aligns with the key. Always consult the owner's manual for the exact latch sequence to avoid bent pins.

Points forts

  • ECC protection guards data integrity with error correction
  • 16 GB capacity expands NAS storage for heavier workloads
  • 2666 MHz DDR4 speed matches Synology DS1821+ specifications
  • 2 V low voltage reduces power draw and heat
  • 260-pin SODIMM form factor fits directly into the NAS slot

Caractéristiques

BrandNEMIX RAM
SeriesSynology Compatible Series NAS Memory
ModelSynology DDR4 2666MHZ ECC Unbuffered SODIMM
Part NumberMSE21300-628K1
Capacity16GB
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
Rank2Rx8
FeaturesDDR4 ECC Unbuffered SODIMM Motherboard Compatible
Package Content16GB (1X16GB) DDR4 2666MHZ PC4-21300 2Rx8 1.2V CL19 260-PIN ECC Unbuffered SODIMM

Questions sur cet article

Will the CL19 latency on this DDR4 2666 ECC module change over time or require replacement?

DDR4 ECC unbuffered SODIMMs are solid-state with no moving parts; the CL19 timing is fixed in the SPD and does not degrade, so no scheduled replacement is needed.

What limit appears first when the DS1821+ runs this 2Rx8 stick at full load continuously?

The memory controller caps throughput at the rated 2666 MT/s and 1.20 V; sustained workloads hit that bandwidth ceiling before the module itself throttles.

How much extra heat and power does the 16 GB unbuffered SODIMM add during all-day operation?

At 1.2 V the stick draws only a few watts, produces minimal heat, and has no fan or spreader, so system thermals and noise stay essentially unchanged.

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