NEMIX RAM
NEMIX RAM 64GB (4X16GB) 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 64GB: 64GB kit (4x16GB) fills all four SODIMM slots on Synology DS/RS NAS units; main trade-off: runs 2666MHz CL19, slower timings than enthusiast DDR4.
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Pros & Cons
Pros
- ✓ 64GB kit (4x16GB) fills all four SODIMM slots on Synology DS/RS NAS units
- ✓ ECC unbuffered SODIMM catches single-bit errors on 24/7 NAS workloads
- ✓ Spec-matched to Synology D4ECSO-2666-16G, so no module-mixing guesswork
- ✓ Lifetime replacement warranty from NEMIX, per the manufacturer listing
Cons
- ✗ Runs 2666MHz CL19, slower timings than enthusiast DDR4
- ✗ Third-party module, so Synology may push back on unsupported-memory support tickets
- ✗ 2Rx8 dual-rank 260-pin SODIMM won't fit desktop DIMM slots or non-ECC-capable boards
- ✗ Sold only as a fixed 4x16GB kit, no 32GB or 2x16GB step-up path
SpecPicks Verdict
SpecPicks scored NEMIX RAM 64GB (4X16GB) DDR4 2666MHz PC4-21300 2Rx8 1.2V CL19… using a rating × review-volume × price-fit model applied to published specs and reviews across the memory (ram) category. NEMIX RAM's memory (ram) 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 memory (ram) 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 — 64GB (4X16GB) kit DDR4-2666 (PC4-21300), 2Rx8 ECC, 1.2V, CL19, 260-pin SODIMM. The precise rank, voltage, and speed your system's memory controller expects, so it's recognized at full capacity and posts correctly.
- VERIFIED FITMENT — Direct replacement for D4ECSO-2666-16G. The 260-pin ECC SODIMM form factor required by ECC-capable NAS Devices and compact servers — not a desktop UDIMM. Spec-matched to your unit's memory-population rules.
- DATA INTEGRITY — On-module ECC catches and corrects single-bit errors on the fly — protecting against silent data corruption and unexpected reboots in the 24/7 RAID and storage workloads ECC NAS and compact-server systems run.
- CHECK YOUR CONFIG — NAS and system memory support varies by model. Check your unit's compatibility list and manual for supported capacities and approved DIMM population before purchase.
- LIFETIME SUPPORT — Backed by a lifetime replacement warranty and free US-based technical support.
Full Specifications
| Brand | NEMIX RAM |
|---|---|
| Weight | 16g |
| Voltage | 1.2 volts |
| RAM Size | 64 GB |
| Model Name | DDR4 2666MHZ PC4-21300 ECC SODIMM Compatible with Synology DiskStation |
| Unit Count | 4 Count |
| Form Factor | SO-DIMM |
| Memory Speed | 2666 MHz |
| Number of Pins | 260 |
| Memory Generation | DDR4 |
| Compatible Devices | Compatible with Synology DiskStation DS3617xsII NAS, D4ECSO-2666-16G |
| Data Transfer Rate | 2666 MHz |
| Memory Form Factor | SODIMM |
| Additional Features | Compatible with Synology NAS |
| Computer Memory Size | 64 GB |
| Warranty Description | Lifetime Warranty |
| RAM Memory Technology | DDR4 ECC SODIMM |
| Column Address Strobe Latency | 19 |
Ready to buy?
NEMIX RAM 64GB (4X16GB) 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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