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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

  • Total capacity16 GB
  • Rated speedDDR4 2666 (PC4 21300)
  • ChipsetMajor OEM Samsung, Micron, Hynix
  • CAS latencyCL19
  • Buffer typeRegistered
  • Rated voltage1.2 V
  • 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.

How it compares

Measured against everything we stock in Model-Specific Memory Upgrades, at today’s prices. Recalculated every night.

Price $99.99
Cheaper than about 68% of the 21,161 comparable items (median $397.99).
Total capacity 16 GB
Lower than about 70% of the 20,941 comparable items (median 32 GB).
Price per GB $6.25 per GB
Cheaper than about 63% of the 20,941 comparable items (median $8.19 per GB).

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Specifications

Product
Brand nameNEMIX RAM
Product lineSynology Compatible Series NAS Memory
Model nameSynology DDR4 2666 MHz ECC RDIMM Registered Server Memory
Part numberMR21300-614K1
Total capacity16 GB
Product type288-Pin DDR4 RDIMM
Performance
Rated speedDDR4 2666 (PC4 21300)
Processor
ChipsetMajor OEM Samsung, Micron, Hynix
Memory
CAS latencyCL19
ECC supportYes
Buffer typeRegistered
Heat spreaderNo
Memory rank1Rx4
Power
Rated voltage1.2 V
Compatibility
Compatible systemsSynology
In the box
Included items16 GB (1 × 16 GB) DDR4 2666 MHz PC4-21300 1Rx4 1.2 V 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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