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Four green DDR4 RDIMM modules with gold contacts and black chips, no heat spreaders

NEMIX RAM

NEMIX RAM 64GB (4×16GB) DDR4 2666 ECC RDIMM memory upgrade for Synology FS3410

SKU CH-8J19-6RBXK

A 64GB kit of four 16GB DDR4 2666 ECC registered DIMMs validated for the Synology FS3410

  • Total capacity64 GB (4 × 16 GB)
  • Rated speedDDR4 2666 (PC4 21300)
  • ChipsetMajor OEM Samsung, Micron, Hynix
  • CAS latencyCL19
  • Buffer typeRegistered
  • Rated voltage1.2 V
  • 64 GB total capacity across four 16 GB modules
  • DDR4 2666 speed rated at PC4-21300 bandwidth
  • ECC registered RDIMM design protects data integrity
  • Low 1.20 V operating voltage reduces power draw
  • Validated for Synology FlashStation FS3410 NAS systems

Synology FS3410 DDR4 ECC RDIMM kit

This 64 GB kit contains four 16 GB DDR4 2666 registered DIMMs built for the Synology FlashStation FS3410. ECC and registered buffering protect data integrity in the NAS. The modules run at 1.2 V with CL19 latency.

Tool-less DIMM installation in minutes

The FS3410 chassis exposes memory slots behind a removable cover so each 288-pin module seats without tools. Align the notch, press until the latches click, and replace the cover. The only common issue is inserting a DIMM off-centre, which prevents the latches from engaging.

64 GB total capacity for multi-user workloads

Four ranks per module (2Rx4) give the controller dense addressable memory for virtual machines, Docker containers and large file caches. The kit fills all four slots, so further expansion requires replacing modules rather than adding them.

How it compares

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

Price $449.99
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 $7.03 per GB
Cheaper than about 57% of the 20,941 comparable items (median $8.19 per GB).

New to this? Buying memory and SSDs with crypto — what to check, what it costs to pay, and what is never asked for.

Specifications

Product
Brand nameNEMIX RAM
Product lineSynology Compatible Series NAS Memory
Model nameSynology DDR4 2666 MHz ECC RDIMM Registered Server Memory
Part numberMR21300-624K4
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 rank2Rx4
Power
Rated voltage1.2 V
Compatibility
Compatible systemsSynology
In the box
Included items64 GB (4 × 16 GB) DDR4 2666 MHz PC4-21300 2Rx4 1.2 V CL19 288-PIN ECC RDIMM Registered Server Memory KIT

Questions about this item

How can I confirm the 64GB kit is running at 2666 MT/s with ECC active on the FS3410?

Open DSM Control Panel → Info Center → Memory; it will show 64 GB, DDR4-2666, ECC Registered and the CL19 timing if the modules are operating correctly.

What does the package contain and is anything else required for installation?

The box holds four 16 GB 288-pin DDR4 RDIMM modules (2Rx4, 1.20 V, CL19); no extra parts or tools are needed — just follow the FS3410 owner’s manual for slot population.

Why choose the 64 GB (4×16 GB) kit instead of a smaller capacity?

The FS3410 supports up to 64 GB; populating all four slots with 16 GB modules gives maximum capacity and keeps each channel balanced at 2Rx4 rank.

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