We take cryptocurrency — so the coins you hold can buy real hardware.Pay in crypto, spend it on real hardware. Free insured shipping worldwide over $399. Plain, unbranded boxes, sent from Germany.Free insured shipping over $399. Your rate is locked for 30 minutes once checkout opens.Rate locked 30 minutes. Every item sealed, serial-checked and covered by a 24-month warranty.Sealed, 24-month warranty.

Saved items Sign in
Four green DDR4 RDIMM modules in a clear tray

NEMIX RAM

NEMIX RAM MR21300-614K4 64GB (4x16GB) DDR4 2666 ECC RDIMM CL19 1.2V 288-Pin memory upgrade

SKU CH-9Q0Z-8C64X

64GB quad-kit of DDR4 2666 ECC registered RDIMMs built for Synology FlashStation FS3600 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 guards data integrity in critical workloads
  • Registered design stabilises signal quality on server motherboards
  • 64 GB kit expands NAS capacity for heavy multitasking
  • 2 V operation reduces power draw per module
  • Validated compatibility with Synology FlashStation FS3600 NAS

Synology NAS Memory Upgrade

This 64GB kit provides four 16GB DDR4 2666 registered ECC modules validated for the Synology FlashStation FS3600. It targets administrators who need to expand memory capacity in that specific NAS platform.

Tool-Free Module Installation

The 288-pin RDIMM form factor fits standard server DIMM slots and requires no special tools. The main risk is mixing registered ECC modules with unbuffered non-ECC memory, which will prevent the system from posting.

Sustained Load Stability

Registered buffering and on-die ECC maintain data integrity during continuous file-serving and virtualization workloads. The 1.2V operating voltage keeps thermal output consistent over long duty cycles without throttling.

How it compares

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

Price $392.99
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 $6.14 per GB
Cheaper than about 64% 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 numberMR21300-614K4
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

How do I verify the 2666MHz DDR4 ECC RDIMM is running correctly after installation?

Enter the Synology DSM interface after boot and open the Resource Monitor to confirm all four 16GB modules appear at 2666MHz with ECC active and CL19 timings.

What ships in the MR21300-614K4 kit and do I need anything else?

The box contains four 16GB 288-pin DDR4 2666 ECC registered DIMMs (1Rx4, 1.20V, CL19). No extra cables, brackets or software are required.

Which capacity version should I pick for a Synology FlashStation FS3600?

This 64GB kit (4 x 16GB) matches the FS3600's four-slot layout and is the only capacity offered under part number MR21300-614K4.

More in Model-Specific Memory Upgrades

Similar items