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Green circuit board SODIMM memory module with black chips, no heat spreader

NEMIX RAM

NEMIX RAM 16GB DDR4 2666 ECC Unbuffered SODIMM CL19 2Rx8 1.2V 260-pin Synology DS1621+ memory upgrade

SKU CH-TVFT-HZREX

16GB DDR4 2666 ECC SODIMM adds error-correcting memory to Synology DS1621+ NAS

  • Capacity16GB
  • SpeedDDR4 2666 (PC4 21300)
  • ECCYes
  • Buffered/RegisteredUnbuffered
  • ChipsetMajor OEM Samsung, Micron, Hynix
  • Voltage1.20V
  • ECC protection prevents data errors in critical NAS workloads
  • 16 GB capacity expands DS1621+ memory for heavier multitasking
  • 2666 MT/s DDR4 speed matches system bus for stable throughput
  • CL19 latency at 1.2 V balances responsiveness with low power draw
  • 260-pin SODIMM form factor fits Synology DiskStation DS1621+ slots directly

Synology DS1621+ 16GB ECC SODIMM

This 16GB DDR4 2666 module adds ECC protection to the Synology DiskStation DS1621+. It runs at 1.2V with CL19 timing and uses a 2Rx8 unbuffered layout. The 260-pin SODIMM form factor fits the NAS memory slots directly.

Single module ready for installation

The package contains one 16GB stick, so no pairing or matching is required. ECC circuitry corrects single-bit errors without needing registered buffering. Major-brand Samsung, Micron or Hynix chips are used depending on supply. No heat spreader is included, keeping the profile low for tight NAS bays.

Suits DS1621+ owners adding ECC capacity

Buyers who need registered DIMMs, non-ECC memory or a different pin count should look elsewhere. Systems that require 288-pin desktop modules or higher voltage operation are not compatible.

Highlights

  • ECC protection prevents data errors in critical NAS workloads
  • 16 GB capacity expands DS1621+ memory for heavier multitasking
  • 2666 MT/s DDR4 speed matches system bus for stable throughput
  • CL19 latency at 1.2 V balances responsiveness with low power draw
  • 260-pin SODIMM form factor fits Synology DiskStation DS1621+ slots directly

Specifications

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 about this item

Will the CL19 timing on this DDR4 2666 module need any adjustment or replacement over time?

No, the CL19 timing is fixed by the SPD and requires no adjustment; the module itself has no moving parts and is not a wear item.

What limit appears first when the DS1621+ runs this 16 GB 2Rx8 stick continuously?

The NAS CPU and memory-controller throughput ceiling is reached before the 2666 MT/s DIMM saturates.

How much heat and power does the 1.2 V unbuffered ECC SODIMM add during all-day operation?

It draws 1.2 V with no heat spreader, so thermal output is minimal and well within the DS1621+ cooling design.

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