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Two green DDR4 ECC SODIMM sticks, no heat spreaders, 260-pin, 16GB kit

NEMIX RAM

NEMIX RAM 16GB (2x8GB) DDR4 2666 ECC SODIMM kit for Synology DS723+

SKU CH-R4W5-QEGPP

A 16 GB DDR4 ECC SODIMM kit running at 2666 MHz with CL19 latency for Synology DS723+ 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
  • ECC protection guards data integrity with built-in error correction
  • 16 GB kit (2×8 GB) expands NAS capacity for heavier workloads
  • DDR4 2666 speed matches DS723+ specification for stable operation
  • Low 1.2 V voltage reduces power draw and heat in the enclosure
  • 260-pin SODIMM form factor fits the Synology memory slots directly

Synology DS723+ ECC SODIMM kit

This 16GB kit contains two 8GB DDR4 2666 ECC unbuffered SODIMM modules built for the Synology DiskStation DS723+ NAS. Each stick runs at 1.2V with CL19 timing and uses a 260-pin layout. The memory is validated for that specific platform.

NAS owners needing ECC reliability

The kit suits administrators who want error-correcting memory for data integrity in a DS723+ enclosure. Builders working with non-ECC laptops, standard desktop DIMM slots, or systems that require registered modules should look elsewhere.

DDR4 2666 ECC unbuffered SODIMM

The single specification that decides fit is the combination of DDR4 2666 speed, ECC unbuffered operation, and 260-pin SODIMM form factor. Only systems that accept this exact module type will recognise the kit.

How it compares

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

Price $121.99
Cheaper than about 65% 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 $7.62 per GB
Typical for this category: the median of 20,941 items is $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 choose the 16 GB kit or a different capacity for my DS723+?

This kit provides 16 GB as two 8 GB modules, matching the two slots in the DS723+ for a balanced, dual-channel upgrade.

What does the 2666 MHz rating deliver once installed in the NAS?

The modules run at DDR4 2666 with CL19 latency and 1.20 V, giving the DS723+ its rated memory bandwidth for file serving and virtualization workloads.

How does the 260-pin ECC SODIMM interface limit performance in practice?

The 260-pin DDR4 ECC SODIMM form factor caps speed at the JEDEC 2666 standard, so the kit operates at PC4-21300 without overclocking headroom.

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