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Green rectangular circuit board with gold edge connectors and black memory chips

NEMIX RAM

NEMIX RAM 16GB DDR4 2666 ECC Unbuffered SODIMM CL19 1.2V 2Rx8 260-pin memory upgrade

SKU CH-ENPY-AF1VV

16 GB DDR4 2666 ECC unbuffered SODIMM for Synology NAS, CL19 1.2 V 2Rx8 260-pin

  • Capacity16GB
  • SpeedDDR4 2666 (PC4 21300)
  • ECCYes
  • Buffered/RegisteredUnbuffered
  • ChipsetMajor OEM Samsung, Micron, Hynix
  • Voltage1.20V
  • 16GB DDR4 2666 ECC protects data integrity in Synology NAS
  • CL19 latency at 1.2V balances speed with low power draw
  • 2Rx8 260-pin SODIMM fits DS3617xsII slots directly
  • Major OEM chips from Samsung Micron Hynix ensure reliability
  • Unbuffered ECC design adds error correction without registered overhead

16 GB DDR4 2666 ECC SODIMM for Synology NAS

This 16 GB module adds ECC-protected DDR4 memory to compatible Synology DiskStation units such as the DS3617xsII. It targets administrators who need error-correcting capacity for file services, virtualization or backup workloads. The unbuffered 2Rx8 design fits standard 260-pin SODIMM slots without requiring registered memory support.

Runs at 1.20 V with CL19 latency and no heat

Operating at the standard DDR4 1.20 V level, the module draws minimal power and generates little heat inside a densely populated NAS chassis. Absence of a heat spreader keeps the profile low for tight drive-bay clearances while CL19 timing delivers stable throughput at 2666 MT/s. Passive cooling in the enclosure is sufficient for normal sustained loads.

Single 16 GB stick leaves other slots free

The 1x16 GB configuration occupies one SODIMM slot, preserving remaining sockets for future capacity increases. Compatibility is validated for the listed Synology platform, so installation follows the manufacturer's upgrade procedure without BIOS changes. Builders needing higher density per slot or registered DIMMs should select a different module type.

Highlights

  • 16GB DDR4 2666 ECC protects data integrity in Synology NAS
  • CL19 latency at 1.2V balances speed with low power draw
  • 2Rx8 260-pin SODIMM fits DS3617xsII slots directly
  • Major OEM chips from Samsung Micron Hynix ensure reliability
  • Unbuffered ECC design adds error correction without registered overhead

Specifications

BrandNEMIX RAM
SeriesSynology Compatible Series NAS Memory
ModelSynology DDR4 2666MHZ ECC Unbuffered SODIMM
Part NumberMSE21300-628K1
Capacity16GB
SpeedDDR4 2666 (PC4 21300)
ECCYes
Buffered/RegisteredUnbuffered
ChipsetMajor OEM Samsung, Micron, Hynix
Voltage1.20V
Compatible SystemSynology
CAS LatencyCL19
Heat SpreaderNo
Type260-PIN DDR4 ECC SODIMM
Rank2Rx8
FeaturesDDR4 ECC Unbuffered SODIMM Motherboard Compatible
Package Content16GB (1X16GB) DDR4 2666MHZ PC4-21300 2Rx8 1.2V CL19 260-PIN ECC Unbuffered SODIMM

Questions about this item

How do I install this 260-pin DDR4 SODIMM in my Synology DS3617xsII and what step is often missed?

Power down the NAS, remove the cover, insert the module at an angle into the SODIMM slot until the gold contacts are hidden, then press firmly until the side clips click — the step most people miss is fully seating both clips so the ECC memory registers correctly.

What maintenance or replacement will this 16GB ECC Unbuffered module need over time?

No routine maintenance is required; the module has no heat spreader or moving parts, and ECC error correction handles single-bit errors transparently — replacement is only needed if a sustained multi-bit error appears in system logs.

What limit appears first when this CL19 2666MHz memory runs under sustained NAS workloads?

The CAS latency of CL19 at 1.20V sets the timing ceiling; under continuous heavy load the memory controller will hit latency-bound throughput before thermal or voltage limits become a factor.

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