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Eight green DDR4 RDIMM modules in anti-static packaging

NEMIX RAM

NEMIX RAM 128GB (8x16GB) DDR4 2666 ECC RDIMM CL19 1.2V Synology FS6400 memory upgrade

SKU CH-CHYJ-WFWSH

Eight 16 GB DDR4-2666 ECC registered DIMMs totalling 128 GB, CL19 at 1.2 V for Synology FlashStation FS6400

  • Capacity128GB (8 x 16GB)
  • SpeedDDR4 2666 (PC4 21300)
  • ECCYes
  • Buffered/RegisteredRegistered
  • ChipsetMajor OEM Samsung, Micron, Hynix
  • Voltage1.20V
  • 128GB total capacity with eight 16GB modules
  • ECC registered design protects data integrity under load
  • DDR4 2666 speed rated at PC4-21300 bandwidth
  • Low 1.2V operation reduces power draw and heat
  • Validated for Synology FlashStation FS6400 NAS systems

128GB DDR4 2666 ECC RDIMM kit

This NEMIX RAM kit supplies 128GB across eight 16GB DDR4 2666 registered ECC modules. Each stick runs at 1.2V with CL19 timing and uses a 288-pin RDIMM form factor. The memory is validated for the Synology FlashStation FS6400 NAS.

Suits FS6400 owners needing maximum ECC capacity

The eight-module layout fills every slot in the FS6400, so builders who only want a partial upgrade or who need unbuffered UDIMMs should choose a different kit. Systems that cannot address 128GB or that require non-ECC memory are also incompatible.

1Rx4 rank configuration determines compatibility

The 1Rx4 organisation is the single specification that decides whether this kit will post in the FS6400. Verify that your NAS firmware and memory controller support 1Rx4 registered DIMMs before purchasing.

Highlights

  • 128GB total capacity with eight 16GB modules
  • ECC registered design protects data integrity under load
  • DDR4 2666 speed rated at PC4-21300 bandwidth
  • Low 1.2V operation reduces power draw and heat
  • Validated for Synology FlashStation FS6400 NAS systems

Specifications

BrandNEMIX RAM
SeriesSynology Compatible Series NAS Memory
ModelSynology DDR4 2666MHZ ECC RDIMM Registered Server Memory
Part NumberMR21300-614K8
Capacity128GB (8 x 16GB)
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 Content128GB (8X16GB) DDR4 2666MHZ PC4-21300 1Rx4 1.2V CL19 288-PIN ECC RDIMM Registered Server Memory KIT

Questions about this item

What is the pin count and form factor of the 288-pin DDR4 RDIMM modules in this kit?

Each module is a 288-pin DDR4 RDIMM, the standard form factor for registered server memory, and they install vertically into the DIMM slots on the Synology FS6400 motherboard.

How are the eight 1Rx4 ECC RDIMM modules installed, and what step is often missed?

Power off the NAS, open the chassis, align each module's notch with the slot key, press firmly until the retention clips click, then verify in DSM that all 128GB are detected at 2666 MT/s with ECC active.

What ongoing maintenance does the registered ECC RDIMM kit require in a Synology FS6400?

No routine maintenance is needed; the modules have no heat spreaders or moving parts, so keep the NAS vents clear and run DSM memory diagnostics if the system logs correctable ECC errors.

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