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Green circuit board with black memory chips, gold edge connector, no heat spreader

NEMIX RAM

NEMIX RAM 16GB DDR4 2666 ECC RDIMM CL19 1.2V Synology SA3400 memory upgrade

SKU CH-ASMX-A09BG

16 GB DDR4 2666 MHz ECC registered DIMM validated for Synology SA3400 NAS

  • Capacity16GB
  • SpeedDDR4 2666 (PC4 21300)
  • ECCYes
  • Buffered/RegisteredRegistered
  • ChipsetMajor OEM Samsung, Micron, Hynix
  • Voltage1.20V
  • 16 GB DDR4 ECC RDIMM boosts Synology SA3400 capacity
  • Registered 1Rx4 design with CL19 latency keeps data integrity high
  • 2666 MHz PC4-21300 speed matches system spec for stable throughput
  • 2 V low-voltage operation reduces power draw in NAS chassis
  • 288-pin DDR4 form factor fits SA3400 slots for tool-free install

Synology SA3400 DDR4 ECC RDIMM

This 16 GB registered DDR4 module is validated for the Synology SA3400 NAS. It adds ECC protection and registered buffering to maintain data integrity in multi-user storage workloads. The single-rank 1Rx4 organisation fits one 288-pin slot without mixing ranks.

Sustained load behaviour

ECC corrects single-bit errors on the fly while the register reduces electrical load on the memory controller during continuous operation. CL19 latency at 2666 MT/s delivers steady throughput for file services, virtualization and backup tasks that run for hours rather than seconds.

Build and daily implications

The module ships without a heat spreader, relying on the NAS chassis airflow for cooling. Major OEM DRAM from Samsung, Micron or Hynix is stress-tested before dispatch. Installation follows the standard DIMM sequence in the SA3400 service manual.

Highlights

  • 16 GB DDR4 ECC RDIMM boosts Synology SA3400 capacity
  • Registered 1Rx4 design with CL19 latency keeps data integrity high
  • 2666 MHz PC4-21300 speed matches system spec for stable throughput
  • 2 V low-voltage operation reduces power draw in NAS chassis
  • 288-pin DDR4 form factor fits SA3400 slots for tool-free install

Specifications

BrandNEMIX RAM
SeriesSynology Compatible Series NAS Memory
ModelSynology DDR4 2666MHZ ECC RDIMM Registered Server Memory
Part NumberMR21300-614K1
Capacity16GB
SpeedDDR4 2666 (PC4 21300)
ECCYes
Buffered/RegisteredRegistered
ChipsetMajor OEM Samsung, Micron, Hynix
Voltage1.20V
Compatible SystemSynology
CAS LatencyCL19
Heat SpreaderNo
Type288-Pin DDR4 RDIMM
Rank1Rx4
FeaturesDDR4 ECC Registered RDIMM Server Motherboard Compatible
Package Content16GB (1X16GB) DDR4 2666MHZ PC4-21300 1Rx4 1.2V CL19 288-PIN ECC RDIMM Registered Server Memory

Questions about this item

Does the 1.2 V registered DDR4 module run hot or loud under continuous load in the SA3400?

Registered ECC RDIMMs operate at standard DDR4 voltage with no moving parts, so heat output is low and there is no fan noise in a populated NAS chassis.

What must the Synology SA3400 already have for this 16 GB RDIMM to work?

The SA3400 needs an available 288-pin DDR4 DIMM slot and a BIOS that supports registered ECC memory at 2666 MT/s.

Will this CL19 2666 MHz stick work alongside the original SA3400 memory?

Yes, it matches the SA3400's native DDR4 2666 registered ECC specification, so mixed ranks and capacities are supported per Synology's memory rules.

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