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Four green 288-pin DDR4 RDIMM modules without heat spreaders

NEMIX RAM

NEMIX RAM 128GB (4×32GB) DDR4 2666 PC4-21300 CL19 ECC RDIMM memory upgrade

SKU CH-QMRD-5Z939

A 128 GB DDR4 2666 ECC registered kit of four 32 GB modules validated for Synology FlashStation FS6400 NAS

  • Capacity128GB (4 x 32GB)
  • SpeedDDR4 2666 (PC4 21300)
  • ECCYes
  • Buffered/RegisteredRegistered
  • ChipsetMajor OEM Samsung, Micron, Hynix
  • Voltage1.20V
  • 128 GB total capacity for demanding workloads
  • ECC registered design protects data integrity
  • 2666 MHz DDR4 speed matches system specs
  • 2 V operation reduces power draw
  • 288-pin RDIMM form factor fits Synology FS6400

Synology FlashStation FS6400 NAS Kit

This 128GB kit contains four 32GB DDR4 2666 ECC RDIMM modules validated for the Synology FlashStation FS6400 NAS. It is built for administrators who need registered, error-correcting memory to keep a production storage appliance stable under load. The kit is not suited for desktop PCs or consumer motherboards that require unbuffered DIMMs.

Registered ECC DDR4 2666 PC4-21300

The modules run at 2666 MT/s with CL19 latency at 1.20V and present a 2Rx4 organisation to the memory controller. Registered buffering and ECC are mandatory for the target platform; systems that only accept unbuffered non-ECC DDR4 cannot use this kit. No higher speeds or lower latencies are specified for this part.

288-Pin 2Rx4 1.2V RDIMM Form Factor

Each stick is a 288-pin DDR4 RDIMM with a 2Rx4 rank structure, the single specification that determines whether the memory will post in the FlashStation FS6400. Buyers must verify that their chassis and firmware support 32GB 2Rx4 registered modules before purchasing.

Highlights

  • 128 GB total capacity for demanding workloads
  • ECC registered design protects data integrity
  • 2666 MHz DDR4 speed matches system specs
  • 2 V operation reduces power draw
  • 288-pin RDIMM form factor fits Synology FS6400

Specifications

BrandNEMIX RAM
SeriesSynology Compatible Series NAS Memory
ModelSynology DDR4 2666MHZ ECC RDIMM Registered Server Memory
Part NumberMR21300-324K4
Capacity128GB (4 x 32GB)
SpeedDDR4 2666 (PC4 21300)
ECCYes
Buffered/RegisteredRegistered
ChipsetMajor OEM Samsung, Micron, Hynix
Voltage1.20V
Compatible SystemSynology
CAS LatencyCL19
Heat SpreaderNo
Type288-Pin DDR4 RDIMM
Rank2Rx4
FeaturesDDR4 ECC Registered RDIMM Server Motherboard Compatible
Package Content128GB (4X32GB) DDR4 2666MHZ PC4-21300 2Rx4 1.2V CL19 288-PIN ECC RDIMM Registered Server Memory KIT

Questions about this item

Should I pick the 128 GB kit or a smaller capacity for my Synology FS6400?

The 128 GB kit provides four 32 GB modules; choose it if your FS6400 has four free slots and you need maximum capacity, otherwise select a smaller kit that matches the slots you can fill.

What does the 2666 MHz rating actually deliver inside the NAS?

The modules run at 2666 MT/s with CL19 timing, giving the rated PC4-21300 bandwidth when the FS6400 memory controller operates at its native DDR4 2666 speed.

How does the DDR4 RDIMM ECC interface limit performance in this system?

The 288-pin registered DDR4 ECC interface caps the kit at 2666 MT/s and CL19, so the FS6400 cannot run the memory faster than its supported DDR4 2666 standard.

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