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Four green 260-pin DDR4 SODIMM modules without heat spreaders

NEMIX RAM

NEMIX RAM 64GB (4x16GB) DDR4 2666 ECC SODIMM memory upgrade

SKU CH-DQ7D-9SKKS

64 GB kit of four 16 GB DDR4 2666 ECC unbuffered SODIMM modules at 1.2 V CL19 for Synology NAS upgrades

  • Total capacity64 GB (4 × 16 GB)
  • Rated speedDDR4 2666 (PC4 21300)
  • ChipsetMajor OEM Samsung, Micron, Hynix
  • CAS latencyCL19
  • Buffer typeUnbuffered
  • Rated voltage1.2 V
  • 64 GB kit expands NAS capacity for heavy workloads
  • Four 16 GB modules fill four slots in one purchase
  • DDR4 2666 speed matches Synology D4ECSO-2666-16G specification
  • ECC unbuffered design protects data integrity in critical tasks
  • 2 V low-voltage modules reduce power draw and heat

Synology DDR4 2666 ECC SODIMM Kit

This NEMIX RAM kit supplies 64GB across four 16GB DDR4 2666 modules built for Synology NAS units. Each stick is a 260-pin unbuffered ECC SODIMM running at 1.20V with CL19 latency and a 2Rx8 organisation. The modules use major OEM chips and are stress-tested for stability in always-on storage appliances.

Suited for Synology NAS expansion only

The kit targets administrators who need to maximise the supported memory capacity of a compatible Synology model. Builders working with non-Synology platforms, desktop motherboards requiring registered DIMMs, or systems limited to lower-density modules should look elsewhere. The unbuffered ECC design will not function in servers that mandate registered memory.

Four matched modules simplify installation

The package delivers a pre-matched quad-channel set so the NAS can be populated in a single step without mixing revisions. No heat spreaders are included, keeping the low-profile form factor intact for tight drive-bay clearances. No additional software or configuration utilities are bundled; the memory is recognised automatically by the Synology firmware.

How it compares

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

Price $458.99
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 $7.17 per GB
Cheaper than about 56% 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 Unbuffered SODIMM
Part numberMSE21300-628K4
Total capacity64 GB (4 × 16 GB)
Product type260-PIN DDR4 ECC SODIMM
Performance
Rated speedDDR4 2666 (PC4 21300)
Processor
ChipsetMajor OEM Samsung, Micron, Hynix
Memory
CAS latencyCL19
ECC supportYes
Buffer typeUnbuffered
Heat spreaderNo
Memory rank2Rx8
Power
Rated voltage1.2 V
Compatibility
Compatible systemsSynology
In the box
Included items64 GB (4 × 16 GB) DDR4 2666 MHz PC4-21300 2Rx8 1.2 V CL19 260-PIN ECC Unbuffered SODIMM KIT

Questions about this item

Which Synology NAS models accept this 2666 MHz DDR4 ECC SODIMM kit?

The kit is built for Synology systems that use DDR4 2666 ECC unbuffered SODIMM modules; check your NAS manual for the exact model list.

Can I mix these 16 GB 2Rx8 modules with the 8 GB sticks already in my NAS?

Mixing different capacities and ranks is not recommended; for stable ECC operation populate all slots with identical 16 GB 2Rx8 modules.

How do I confirm the NAS recognises all 64 GB at 2666 MT/s with ECC active?

After installation open the DSM Control Panel → Info Center → Memory; it should show 64 GB, 2666 MHz and ECC enabled.

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