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Two green DDR4 SODIMM sticks without heat spreaders, 260-pin, ECC unbuffered

NEMIX RAM

NEMIX RAM 16GB (2x8GB) DDR4 2666MHz ECC SODIMM kit for Synology DS1621

SKU CH-ABRJ-VXWBW

16 GB DDR4 ECC SODIMM kit at 2666 MHz, CL19, 1.2 V for Synology DS1621 NAS

  • Total capacity16 GB (2 × 8 GB)
  • Rated speedDDR4 2666 (PC4 21300)
  • ChipsetMajor OEM Samsung, Micron, Hynix
  • CAS latencyCL19
  • Buffer typeUnbuffered
  • Rated voltage1.2 V
  • 16 GB dual-channel kit expands NAS capacity for heavier workloads
  • ECC protection detects and corrects single-bit errors to safeguard data integrity
  • DDR4 2666 MHz PC4-21300 speed matches the Synology DS1621 memory controller
  • 2 V low-voltage modules reduce power draw and heat in compact bays
  • 260-pin SODIMM form factor installs directly into the DS1621 memory slots

Synology DS1621 ECC SODIMM kit

This NEMIX RAM kit delivers 16 GB of DDR4 2666 ECC unbuffered memory in two 8 GB modules. It is built for the Synology DiskStation DS1621 NAS and uses 260-pin SODIMM form factor with CL19 timing at 1.2 V.

Drop-in NAS memory upgrade

The modules install directly into the DS1621 memory slots without tools or configuration changes. ECC support protects data integrity during intensive file operations and the unbuffered design matches the platform requirements exactly.

Ideal for DS1621 owners needing 16 GB

This kit suits administrators expanding a DS1621 to its supported capacity for virtualization or heavy multi-user workloads. Builders targeting other Synology models, non-ECC platforms or larger single-module densities should verify compatibility before purchasing.

How it compares

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

Price $106.99
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 $6.69 per GB
Cheaper than about 59% 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

How much memory does the 2666 MHz kit add to a DS1621?

The kit provides 16 GB total, delivered as two 8 GB DDR4 ECC SODIMM modules running at CL19 1.20 V

Will the modules run hot or loud inside the NAS during continuous operation?

They have no heat spreader and draw only 1.2 V, so they stay cool and silent under sustained load

Does the NAS need any extra parts or firmware before installing these SODIMMs?

The DS1621 must already have an open 260-pin DDR4 slot and support ECC unbuffered memory

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