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Four green DDR4 RDIMM modules in anti-static tray

NEMIX RAM

NEMIX RAM 64GB (4x16GB) DDR4 2666 ECC RDIMM CL19 1.2V 288-pin Synology SA3600 memory upgrade

SKU CH-K0H0-AZABY

A 64 GB DDR4 2666 ECC registered kit of four 16 GB modules validated for the Synology SA3600 NAS

  • Total capacity64 GB (4 × 16 GB)
  • Rated speedDDR4 2666 (PC4 21300)
  • ChipsetMajor OEM Samsung, Micron, Hynix
  • CAS latencyCL19
  • Buffer typeRegistered
  • Rated voltage1.2 V
  • ECC protection prevents data corruption in critical NAS workloads
  • Registered design stabilises signal integrity for 64 GB capacity
  • DDR4 2666 speed matches Synology SA3600 specifications
  • 20 V operation lowers power draw and thermal output
  • 288-pin RDIMM form factor ensures direct slot compatibility

Synology SA3600 64GB kit

This 64GB kit contains four 16GB DDR4 2666 registered DIMMs built for the Synology SA3600 NAS. Each module runs at 1.2V with CL19 latency and includes on-die ECC for data integrity. The registered design reduces electrical load on the memory controller for stable operation in multi-slot configurations. IT teams use this kit to expand capacity for virtualisation and file workloads.

Upgrade from smaller or non-ECC kits

The kit replaces lower-capacity unbuffered or non-ECC modules that cannot address the SA3600's full slot population. Registered signalling is required when all four slots are populated, so the jump is worth it when the system needs the full 64GB addressable space. Builders who need consumer DIMMs or unregistered memory should look elsewhere.

Sustained load behaviour

Modules are stress tested under load before shipping to verify stability during continuous NAS operations. The 1.2V operating voltage keeps thermal output consistent during extended file transfers or backup windows. Without a heat spreader, airflow across the 288-pin PCB manages temperatures in the SA3600 chassis. The 1Rx4 organisation maintains bandwidth efficiency across all populated channels.

How it compares

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

Price $408.99
Typical for this category: the median of 21,161 items is $397.99.
Total capacity 64 GB (4 × 16 GB)
Higher than about 60% of the 20,941 comparable items (median 32 GB).
Price per GB $6.39 per GB
Cheaper than about 62% 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 numberMR21300-614K4
Total capacity64 GB (4 × 16 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 items64 GB (4 × 16 GB) DDR4 2666 MHz PC4-21300 1Rx4 1.2 V CL19 288-PIN ECC RDIMM Registered Server Memory KIT

Questions about this item

Will these 288-pin DDR4 RDIMMs fit the memory slots in my Synology SA3600?

Yes, the kit is built as a direct upgrade for the Synology SA3600 and uses the standard 288-pin DDR4 RDIMM form factor that the NAS expects.

What is the correct order for installing the four 16 GB modules so the SA3600 recognises all 64 GB?

Populate the four slots following the SA3600 service manual — typically slot 1, then 2, 3, 4 — and seat each RDIMM until the retention clips click; the common mistake is stopping before the clips lock.

If a module fails years from now, can I replace just the faulty 16 GB stick?

The kit carries a lifetime replacement warranty, so a single defective 16 GB RDIMM can be swapped without returning the full 64 GB set.

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