We take cryptocurrency — so the coins you hold can buy real hardware.Pay in crypto, spend it on real hardware. Free insured shipping worldwide over $399. Plain, unbranded boxes, sent from Germany.Free insured shipping over $399. Your rate is locked for 30 minutes once checkout opens.Rate locked 30 minutes. Every item sealed, serial-checked and covered by a 24-month warranty.Sealed, 24-month warranty.

Saved items Sign in
Green rectangular circuit board with gold edge connectors and black memory chips, no heat spreader

NEMIX RAM

NEMIX RAM 16GB DDR4 2666 ECC RDIMM CL19 1.2V 288-pin Synology FS3400 memory upgrade

SKU CH-BTSG-PXXMG

Adds 16 GB of DDR4 2666 ECC registered memory to a Synology FS3400 NAS

  • Capacity16GB
  • SpeedDDR4 2666 (PC4 21300)
  • ECCYes
  • Buffered/RegisteredRegistered
  • ChipsetMajor OEM Samsung, Micron, Hynix
  • Voltage1.20V
  • ECC protection prevents data corruption in the Synology FS3400
  • Registered RDIMM design supports stable server operation under load
  • 16 GB capacity expands NAS memory for heavier workloads
  • DDR4 2666 speed matches the system’s rated frequency
  • Low 1.2 V voltage reduces power draw and heat

Synology FS3400 NAS memory upgrade

This 16 GB DDR4 2666 MHz ECC registered DIMM is validated for the Synology FlashStation FS3400. It targets IT teams who need to expand memory capacity in that specific NAS platform without compatibility risk.

288-pin registered module with major OEM chips

The stick uses Samsung, Micron or Hynix components on a standard 288-pin RDIMM PCB. Registered buffering and ECC protect data integrity under sustained workloads, while 1.2 V operation keeps power draw low. No heat spreader is fitted, so airflow in the chassis handles cooling.

Replaces or adds to factory memory in the FS3400

Adding this module increases total system memory for virtualisation, caching or multi-user file services. The upgrade is worth it when the NAS shows memory pressure during peak loads or when new services require more RAM than the original configuration provides.

Highlights

  • ECC protection prevents data corruption in the Synology FS3400
  • Registered RDIMM design supports stable server operation under load
  • 16 GB capacity expands NAS memory for heavier workloads
  • DDR4 2666 speed matches the system’s rated frequency
  • Low 1.2 V voltage reduces power draw and heat

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

Will the DDR4 2666 PC4-21300 registered ECC module run at its rated speed in a Synology FS3400?

Yes, the module is built to the DDR4 2666 PC4-21300 specification and is validated for the Synology FlashStation FS3400, so it will operate at 2666 MT/s with ECC and registered signalling active.

Does the 288-pin RDIMM fit the memory slots in a Synology FS3400 without a riser or adapter?

The 288-pin DDR4 RDIMM form factor matches the FS3400 DIMM sockets directly; no riser, adapter or special bracket is required.

What is the correct orientation when seating the 1Rx4 ECC RDIMM in the FS3400 slot?

Align the notch on the module with the key in the slot, press down evenly until both retention clips click, and verify the module sits flush — partial seating is the most common error.

Also in this aisle

People compared these

Same shelf, same checkout — eight coins and a 30-minute rate lock.