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Two green circuit boards with black chips, no heat spreader

NEMIX RAM

NEMIX RAM 32GB (2x16GB) DDR4 2666 CL19 ECC SODIMM memory upgrade

SKU CH-PYNW-AXM03

32 GB dual-channel DDR4 ECC SODIMM kit at 2666 MHz CL19, validated for Synology DS1823xs+

  • Total capacity32 GB (2 × 16 GB)
  • Rated speedDDR4 2666 (PC4 21300)
  • ChipsetMajor OEM Samsung, Micron, Hynix
  • CAS latencyCL19
  • Buffer typeUnbuffered
  • Rated voltage1.2 V
  • ECC protection guards data integrity on critical workloads
  • 32 GB dual-channel kit expands NAS memory capacity
  • 2666 MHz DDR4 speed matches Synology DS1823xs+ spec
  • 20 V low voltage reduces power draw and heat
  • 260-pin SODIMM form factor fits compatible Synology bays

Synology DS1823xs+ 32GB ECC SODIMM kit

This 32GB kit contains two 16GB DDR4 2666 ECC unbuffered SODIMMs validated for the Synology RackStation DS1823xs+. The modules run at 1.2V with CL19 timing and use 260-pin 2Rx8 chips from major OEM suppliers. The kit is designed to increase memory capacity in compatible NAS units without additional configuration.

NAS administrators expanding DS1823xs+ memory

The kit suits IT teams who need to add 32GB of error-correcting memory to a supported Synology rackmount NAS. Builders working with non-ECC platforms, desktop DIMM slots or DDR5-only systems cannot use these modules. Buyers requiring registered DIMMs, heat spreaders or speeds above 2666 MT/s should look elsewhere.

2666 MT/s DDR4 ECC unbuffered SODIMM specification

The decisive specification is the DDR4 2666 MT/s ECC unbuffered SODIMM format with CL19 latency at 1.2V. Only systems that accept 260-pin 2Rx8 unbuffered ECC modules at this speed and voltage will recognise the full 32GB capacity. Verify the motherboard memory list before purchase.

How it compares

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

Price $241.99
Cheaper than about 57% of the 21,161 comparable items (median $397.99).
Total capacity 32 GB (2 × 16 GB)
Typical for this category: the median of 20,941 items is 32 GB.
Price per GB $7.56 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 numberMSE21300-628K2
Total capacity32 GB (2 × 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 items32 GB (2 × 16 GB) DDR4 2666 MHz PC4-21300 2Rx8 1.2 V CL19 260-PIN ECC Unbuffered SODIMM KIT

Questions about this item

Does the 260-pin DDR4 SODIMM form factor fit the memory slots in a Synology RackStation DS1823xs+?

Yes, the 260-pin DDR4 ECC SODIMM modules are designed for the DS1823xs+ memory slots and match the system's required form factor.

What is the correct orientation for inserting the 2Rx8 ECC SODIMM modules so the notch aligns with the slot key?

Align the notch on the module's gold edge connector with the key in the SODIMM slot, insert at an angle, then press down firmly until the side clips click into place.

Will the Samsung, Micron or Hynix DRAM chips on these modules require any firmware updates or thermal paste replacement over time?

No, the DRAM chips are solid-state components with no firmware or thermal interface material that needs servicing; the modules are maintenance-free for their lifespan.

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