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Four green DDR4 RDIMM sticks in static bags

NEMIX RAM

NEMIX RAM 128GB (4×32GB) DDR4 2666 ECC RDIMM CL19 1.2V Synology FS3600

SKU CH-P433-WGAYY

128 GB DDR4 ECC registered kit (four 32 GB modules) at 2666 MT/s, CL19, 1.2 V for Synology FlashStation FS3600

  • Total capacity128 GB (4 × 32 GB)
  • Rated speedDDR4 2666 (PC4 21300)
  • ChipsetMajor OEM Samsung, Micron, Hynix
  • CAS latencyCL19
  • Buffer typeRegistered
  • Rated voltage1.2 V
  • ECC protects critical data on Synology FS3600
  • Registered DDR4 2666 handles heavy NAS workloads
  • 128 GB kit (4 × 32 GB) maximises FlashStation capacity
  • CL19 latency at 1.20 V keeps power draw low
  • Major OEM Samsung Micron Hynix chips ensure reliability

Synology FS3600 128GB DDR4 Kit

This 128GB kit contains four 32GB DDR4 2666 registered ECC modules validated for the Synology FlashStation FS3600 NAS. IT administrators upgrading mission-critical storage servers use it to expand memory capacity while maintaining data integrity through error correction.

DDR4 2666 Registered ECC Limits

The DDR4 2666 interface runs at 1.20V with CL19 latency and a 2Rx4 organisation, so bandwidth and timing are fixed by the standard and the NAS memory controller. Registered buffering adds one clock cycle of latency but allows the four modules to operate reliably on the FS3600 platform without signal degradation.

288-Pin RDIMM Build and Daily Use

Each module uses major OEM chips from Samsung, Micron or Hynix and omits a heat spreader to fit dense server DIMM slots. The 288-pin RDIMM form factor locks securely into the FS3600 chassis, and the registered design ensures stable operation under continuous enterprise workloads.

How it compares

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

Price $735.99
Pricier than about 57% of the 21,161 comparable items (median $397.99).
Total capacity 128 GB (4 × 32 GB)
Higher than about 70% of the 20,941 comparable items (median 32 GB).
Price per GB $5.75 per GB
Cheaper than about 68% 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 numberMR21300-324K4
Total capacity128 GB (4 × 32 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 rank2Rx4
Power
Rated voltage1.2 V
Compatibility
Compatible systemsSynology
In the box
Included items128 GB (4 × 32 GB) DDR4 2666 MHz PC4-21300 2Rx4 1.2 V CL19 288-PIN ECC RDIMM Registered Server Memory KIT

Questions about this item

Should I buy the 128GB kit or a smaller capacity for my Synology FS3600?

The kit provides 128GB total as four 32GB modules, filling all four slots for maximum supported capacity on the FS3600.

What does the 2666MHz speed mean once installed in the NAS?

The modules run at DDR4 2666 (PC4-21300) with CL19 latency, delivering the rated throughput the FS3600 memory controller supports.

How does the ECC RDIMM interface affect compatibility and limits?

These are 288-pin DDR4 ECC Registered DIMMs (2Rx4, 1.2V) designed specifically for the FS3600; the registered buffer and ECC are required by the platform.

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