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Two green DDR4 ECC SODIMM sticks, no heat spreader

NEMIX RAM

NEMIX RAM Synology 16GB (2x8GB) DDR4 2666 ECC SODIMM memory upgrade

SKU CH-QQ6M-8RYTQ

A 16 GB DDR4 ECC SODIMM kit running at 2666 MHz with CL19 latency and 1.2 V operation, built for Synology NAS upgrades

  • Total capacity16 GB (2 × 8 GB)
  • Rated speedDDR4 2666 (PC4 21300)
  • ChipsetMajor OEM Samsung, Micron, Hynix
  • CAS latencyCL19
  • Buffer typeUnbuffered
  • Rated voltage1.2 V
  • ECC protection guards data integrity during critical workloads
  • DDR4 2666 speed handles demanding NAS applications smoothly
  • 16 GB kit expands capacity for heavier multitasking
  • 2 V operation reduces power draw and heat
  • 260-pin SODIMM form factor fits Synology NAS slots precisely

Synology DDR4 2666 ECC SODIMM kit

This 16GB kit contains two 8GB DDR4 2666 ECC unbuffered SODIMM modules built for compatible Synology NAS units. Each module runs at 1.2V with CL19 timing and uses a 260-pin layout. It targets administrators who need verified ECC memory for data integrity in supported systems.

DDR4 2666 speed and ECC unbuffered limits

The DDR4 2666 interface caps transfer rates at the rated speed, so faster modules will not exceed this ceiling. ECC unbuffered operation requires explicit motherboard support; systems without ECC capability cannot use the error-correction function. Mixing with non-ECC or registered DIMMs is not supported by the memory controller.

2x8GB 260-pin CL19 1.2V specification

The kit delivers 16GB total capacity across two 1Rx8 modules at 1.2V with CL19 latency. Buyers whose NAS requires a different voltage, pin count, rank configuration or latency value should verify compatibility before purchase. Systems limited to single-module population or non-ECC memory cannot use this kit.

How it compares

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

Price $108.99
Cheaper than about 67% of the 21,161 comparable items (median $397.99).
Total capacity 16 GB (2 × 8 GB)
Lower than about 70% of the 20,941 comparable items (median 32 GB).
Price per GB $6.81 per GB
Cheaper than about 58% 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 numberMSE21300-818K2
Total capacity16 GB (2 × 8 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 rank1Rx8
Power
Rated voltage1.2 V
Compatibility
Compatible systemsSynology
In the box
Included items16 GB (2 × 8 GB) DDR4 2666 MHz PC4-21300 1Rx8 1.2 V CL19 260-PIN ECC Unbuffered SODIMM KIT

Questions about this item

Should I pick the 16GB (2 x 8GB) kit or a single 8GB module for my Synology?

The 16GB kit provides two matched 8GB modules for dual-channel operation, while a single module runs in single-channel mode.

What does the 2666 MHz speed deliver in a Synology NAS?

The DDR4 2666 modules run at up to 2666 MT/s, giving a peak bandwidth of PC4-21300 for supported Synology models.

Does the 260-pin ECC SODIMM interface limit capacity or speed in my Synology?

The 260-pin DDR4 ECC SODIMM form factor fits Synology slots that accept 1Rx8 unbuffered modules at 1.2 V.

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