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Green circuit board with black memory chips, no heat spreader, gold edge connectors

NEMIX RAM

NEMIX RAM 8GB DDR4 2666 ECC SODIMM Synology DS923+ memory upgrade

SKU CH-3VDE-7S8R4

Adds 8 GB of DDR4 2666 ECC SODIMM memory to a Synology DS923+ NAS for data-integrity protection

  • Total capacity8 GB
  • Rated speedDDR4 2666 (PC4 21300)
  • ChipsetMajor OEM Samsung, Micron, Hynix
  • CAS latencyCL19
  • Buffer typeUnbuffered
  • Rated voltage1.2 V
  • ECC protection guards data integrity for NAS reliability
  • 2666 MHz DDR4 speed matches DS923+ specifications
  • 2 V operation reduces power draw and heat
  • 260-pin SODIMM form factor fits Synology memory slots
  • Single-rank 1Rx8 layout ensures broad compatibility

Synology DS923+ memory upgrade

This 8 GB DDR4 2666 ECC SODIMM is built for the Synology DiskStation DS923+ NAS. It adds capacity for virtual machines, containers and heavy file workloads. The unbuffered design fits the platform without registration overhead. IT teams choose it for reliable expansion in mission-critical storage.

Low-voltage operation at 1.2 V

The module runs at standard DDR4 voltage with no heat spreader, drawing minimal power inside the NAS chassis. CL19 latency and single-rank 1Rx8 organisation keep signal integrity clean. Passive cooling is sufficient because the stick produces little thermal load. Silent operation is maintained in noise-sensitive rooms.

Validated compatibility removes guesswork

Every stick is stress-tested under load before shipping to confirm stability in the DS923+. The package contains only the SODIMM itself; no cables, brackets or software are included. System-specific tuning means the NAS recognises the module immediately at 2666 MT/s. Buyers needing non-ECC memory or a different form factor should look elsewhere.

How it compares

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

Price $58.99
Cheaper than about 75% of the 21,161 comparable items (median $397.99).
Total capacity 8 GB
Lower than about 80% of the 20,941 comparable items (median 32 GB).
Price per GB $7.37 per GB
Cheaper than about 55% 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 numberMSE21300-818K1
Total capacity8 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 items8 GB (1 × 8 GB) DDR4 2666 MHz PC4-21300 1Rx8 1.2 V CL19 260-PIN ECC Unbuffered SODIMM

Questions about this item

How do I install this 260-pin DDR4 ECC SODIMM in my Synology DS923+ and what step do people often miss?

Power off the NAS, remove the cover, insert the module at an angle until the gold contacts are hidden, then press down until the side clips click; the step often missed is fully seating both clips so the ECC module makes firm contact.

What maintenance or replacement will this 1Rx8 1.20 V ECC module need over time?

No scheduled maintenance is required; the module is designed for continuous operation, and replacement is only necessary if a memory error appears in DSM logs or the NAS fails to boot.

What limit appears first when this CL19 2666 MHz ECC SODIMM runs sustained workloads on a DS923+?

The DS923+ memory controller caps the data rate at 2666 MHz, so the module cannot exceed its rated speed; thermal throttling is unlikely because the unbuffered SODIMM runs at 1.20 V without a heat spreader.

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