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Green DDR4 SODIMM module with black chips, 260 gold pins, no heat spreader

NEMIX RAM

NEMIX RAM 16GB DDR4 2666 CL19 ECC SODIMM 2Rx8 1.2V memory upgrade

SKU CH-Y66H-48648

A 16 GB DDR4 2666 MHz ECC SODIMM with CL19 latency, 1.2 V operation and 2Rx8 organisation for Synology RS1221+ and RS1221RP+ NAS units

  • Capacity16GB
  • SpeedDDR4 2666 (PC4 21300)
  • ECCYes
  • Buffered/RegisteredUnbuffered
  • ChipsetMajor OEM Samsung, Micron, Hynix
  • Voltage1.20V
  • ECC protection guards data integrity in NAS workloads
  • 2666 MT/s DDR4 speed matches Synology RS1221+ specifications
  • 16 GB single module expands capacity without occupying extra slots
  • 2 V operation reduces power draw and heat in dense enclosures
  • Major-brand DRAM chips from Samsung, Micron or Hynix ensure validated reliability

16 GB DDR4 ECC SODIMM for Synology RS1221+

This 16 GB DDR4 2666 module adds ECC protection to compatible Synology RackStation units. It targets administrators who need data-integrity safeguards for file services, virtualization hosts or backup targets. The single 260-pin stick fits the RS1221+ and RS1221RP+ memory slots without adapter cables.

Capacity and headroom

Sixteen gigabytes expands the usable memory pool for ZFS metadata caching, Docker containers and concurrent SMB sessions. The 2Rx8 organisation keeps both ranks active on a single channel, so bandwidth scales with the platform's dual-channel controller. Workloads that exceed 16 GB will page to SSD, increasing latency for database indexes or large photo libraries.

Thermals, noise and power

Operating at 1.2 V, the unbuffered DRAM draws minimal power and produces no audible noise because it has no moving parts. The bare PCB relies on chassis airflow rather than a heat spreader, so case ventilation determines peak temperature. Typical NAS workloads keep module temperatures well within JEDEC limits without extra cooling.

Highlights

  • ECC protection guards data integrity in NAS workloads
  • 2666 MT/s DDR4 speed matches Synology RS1221+ specifications
  • 16 GB single module expands capacity without occupying extra slots
  • 2 V operation reduces power draw and heat in dense enclosures
  • Major-brand DRAM chips from Samsung, Micron or Hynix ensure validated reliability

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 this DDR4 2666 CL19 ECC SODIMM work alongside my existing DDR4 modules in the Synology RS1221+?

The module is validated for the Synology RS1221+ and RS1221RP+. Mixing speeds or ranks is not tested by the manufacturer; for guaranteed stability use identical modules.

How can I confirm the 16 GB DDR4 2666 module is detected and ECC is active after installation?

In DSM open Control Panel > Info Center > System and verify 16 GB appears with ECC shown as supported; the system log will report any correctable memory errors at boot.

Does the 260-pin SODIMM come with a heat spreader or any extra brackets?

The package contains only the 16 GB DDR4 2666 CL19 2Rx8 ECC unbuffered SODIMM; no heat spreader or mounting hardware is included.

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