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NEMIX RAM 32GB (2X16GB) DDR4 2666MHz PC4-21300 2Rx8 1.2V CL19 260-PIN ECC Unbuffered SODIMM NAS Memory KIT Compatible with Synology D4ECSO-2666-16G
NEMIX RAM

NEMIX RAM 32GB (2X16GB) DDR4 2666MHz PC4-21300 2Rx8 1.2V CL19 260-PIN ECC Unbuffered SODIMM NAS Memory KIT Compatible with Synology D4ECSO-2666-16G

Bottom line: The NEMIX RAM 32GB: Exact 260-pin SODIMM match for Synology D4ECSO-2666-16G, not a desktop DIMM; main trade-off: NAS memory support varies by model, so you must check the compatibility list first.

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By , Founder & Editor-in-Chief · Listing data updated

Mike Perry — Hardware researcher since 2014. For external drives and portable storage, synthesises manufacturer specs and independent reviews rather than first-hand lab testing. Core beat: GPU performance across gaming, rendering, and local-LLM inference.

Pros & Cons

Pros

  • ✓ Exact 260-pin SODIMM match for Synology D4ECSO-2666-16G, not a desktop DIMM
  • ✓ 32GB kit ships as 2x16GB, filling both slots on dual-slot NAS units
  • ✓ ECC unbuffered memory catches single-bit errors on always-on file servers
  • ✓ DDR4-2666 PC4-21300 at CL19, 2Rx8 organization for full module recognition
  • ✓ Lifetime replacement warranty plus free US-based technical support

Cons

  • ✗ NAS memory support varies by model, so you must check the compatibility list first
  • ✗ Third-party RAM can complicate warranty conversations with your NAS maker
  • ✗ 1.2V DDR4-2666 speed is fixed, offering no headroom for faster-clocked systems
  • ✗ 260-pin form factor rules out use in desktops or standard DIMM slots

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SpecPicks Verdict

SpecPicks scored NEMIX RAM 32GB (2X16GB) DDR4 2666MHz PC4-21300 2Rx8 1.2V CL19… using a rating × review-volume × price-fit model applied to published specs and reviews across the external storage category. NEMIX RAM's external storage lineup sits within the broader category mid-tier; price and specs are the deciding factors over brand loyalty here. Judge it on the specification table and the price rather than on sentiment: check the figures that decide your use case, then put it side-by-side with two or three close alternatives in the Compare tool before clicking through.

Common buyer scenarios for external storage of this kind: matching it to an existing build, replacing a failing part, or upgrading from a previous-generation equivalent. Check the spec table below against your current setup — particularly socket / form-factor / power-rating fields — and confirm compatibility on the retailer's listing before purchase. Prices and stock are set by the retailer and may have moved since this page was last updated.

Key Features

  • EXACT-MATCH UPGRADE — 32GB (2X16GB) kit DDR4-2666 (PC4-21300), 2Rx8, 1.2V, CL19, 260-pin SODIMM. The memory your Synology or compatible NAS needs, matched to your unit so it's recognized in full and runs reliably.
  • VERIFIED FITMENT — Direct replacement for D4ECSO-2666-16G. The 260-pin SODIMM form factor for NAS units and compact systems that take laptop-style memory — not a desktop DIMM. Check your unit's supported memory and capacity before ordering.
  • REAL-WORLD SPEEDUP — More memory means smoother multitasking and more headroom for apps, containers, and concurrent connections — steadier performance when your NAS is under load.
  • CHECK YOUR CONFIG — NAS memory support varies by model. Check your unit's compatibility list and supported capacity in the manual or maker's spec page before purchase.
  • LIFETIME SUPPORT — Backed by a lifetime replacement warranty and free US-based technical support.

Full Specifications

BrandNEMIX RAM
Weight16g
Voltage1.2 volts
RAM Size32 GB
Model NameDS
Form FactorSO-DIMM
Memory Speed2666 MHz
Number of Pins260
Memory GenerationDDR4
Compatible DevicesDS3617xsII, DS1621+, DS1821+, DS2419+II
Data Transfer Rate2666 MHz
Memory Form FactorSODIMM
Additional FeaturesEcc, Lightweight
Computer Memory Size32 GB
Warranty DescriptionLifetime Warranty
RAM Memory TechnologyDDR4 ECC SODIMM
Column Address Strobe Latency19

Ready to buy?

NEMIX RAM 32GB (2X16GB) DDR4 2666MHz PC4-21300 2Rx8 1.2V CL19 260-PIN ECC Unbuffered SODIMM NAS Memory KIT Compatible with Synology D4ECSO-2666-16G is listed on Amazon. Price, availability, shipping and returns are set by Amazon and its sellers — check the listing for current terms. SpecPicks earns a small commission on qualifying purchases — thank you for supporting independent review work.

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NEMIX RAM 32GB (2X16GB) DDR4 2666MHz PC4-21300 2Rx8 1.2V CL19 260-PIN ECC Unbuffered SODIMM NAS Memory KIT Compatible with Synology D4ECSO-2666-16G
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