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Green bare circuit board with gold edge connector and black memory chips

NEMIX RAM

NEMIX RAM 16GB DDR4 2666 ECC SODIMM CL19 2Rx8 1.2V Synology DS723+

SKU CH-1MXR-DGVKG

16 GB DDR4 ECC SODIMM at 2666 MHz CL19 for Synology DS723+ NAS upgrades

  • Total capacity16 GB
  • Rated speedDDR4 2666 (PC4 21300)
  • ChipsetMajor OEM Samsung, Micron, Hynix
  • CAS latencyCL19
  • Buffer typeUnbuffered
  • Rated voltage1.2 V
  • 16 GB DDR4 2666 ECC for Synology DS723+
  • CL19 latency at 1.2 V for stable NAS operation
  • 2Rx8 dual-rank layout maximises 16 GB density
  • 260-pin SODIMM fits Synology DiskStation DS723+ slot
  • Unbuffered ECC design protects data integrity under load

System-Specific ECC SODIMM for Synology DS723+

This 16GB DDR4 2666MHz ECC Unbuffered SODIMM is built for the Synology DiskStation DS723+ NAS. It uses a 260-pin form factor, runs at 1.20V, and carries a CL19 latency with a 2Rx8 rank structure. The module is validated for compatibility with this specific system.

Suits owners expanding DS723+ memory.

This module suits administrators adding capacity to a Synology DS723+ that requires ECC unbuffered memory. It will not work in laptops or desktops that only accept non-ECC SODIMMs, nor in systems locked to different voltages, speeds, or pin counts. Buyers needing non-ECC memory should look elsewhere.

Deciding spec: ECC Unbuffered SODIMM at DDR4 2666

The single specification that determines fit is the ECC Unbuffered SODIMM type at DDR4 2666 (PC4-21300). Only platforms explicitly supporting this exact combination will recognise the module. Verify your system requires ECC unbuffered DDR4 2666 SODIMMs before purchasing.

How it compares

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

Price $111.99
Cheaper than about 66% of the 21,161 comparable items (median $397.99).
Total capacity 16 GB
Lower than about 70% of the 20,941 comparable items (median 32 GB).
Price per GB $7.00 per GB
Cheaper than about 57% of the 20,941 comparable items (median $8.19 per GB).

New to this? Buying memory and SSDs with crypto — what to check, what it costs to pay, and what is never asked for.

Specifications

Product
Brand nameNEMIX RAM
Product lineSynology Compatible Series NAS Memory
Model nameSynology DDR4 2666 MHz ECC Unbuffered SODIMM
Part numberMSE21300-628K1
Total capacity16 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 items16 GB (1 × 16 GB) DDR4 2666 MHz PC4-21300 2Rx8 1.2 V CL19 260-PIN ECC Unbuffered SODIMM

Questions about this item

Does the 260-pin SODIMM come alone or with any tools or extra modules?

The package contains a single 16 GB DDR4 2666 CL19 ECC SODIMM and nothing else; no tools or additional sticks are included.

Should I pick the 2Rx8 CL19 version or look for a different rank or latency?

This module is built as 2Rx8 with CL19 latency at 1.20 V; choose it when your NAS requires that exact rank and timing configuration.

Will the 2666 MT/s rating actually run at that speed in a DS723+?

The DS723+ memory controller supports DDR4 2666, so the module will operate at its rated 2666 MT/s without downclocking.

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