A-Tech 16GB RAM Replacement for Synology D4ECSO-2666-16G & D4ES01-16G | DDR4 2666 MHz PC4-21300 SODIMM ECC Unbuffered Memory Compatible for NAS & NVR Servers
48% dearer per GB than the average 16GB DDR4 kit we track.
Specification
| Capacity | 16GB |
| Generation | DDR4 |
| Speed | 2666MHz |
| Form factor | SO-DIMM |
| ECC | ECC |
| Buffered | Unbuffered |
| For | Server |
| Brand | A-Tech |
| ASIN | B08VWY26QG |
Price history
Typical price (median) 90-day £183.25 12-month £144.28 12-month low £75.35 All-time low £63.88 (2025-06-04)
Dear for the market Today’s price is 25% above this kit’s typical price for the past year, and it has been cheaper than this for 95% of that year (last on 29 Aug 2026). At £11.27/GB it is dear against the £7.24/GB typical for DDR4 today. Why medians, not averages ›
30-day avg £182.4690-day avg £182.90180-day avg £182.90 (averages are pulled up by price spikes; the medians above are the better guide)
Cheaper per GB in the same spec
Same generation, capacity and form factor as this kit, ranked by £/GB. See all ›
| £/GB | Price | Capacity | Manufacturer | For | Type | Form Factor | ECC / Buffered | Description | |
|---|---|---|---|---|---|---|---|---|---|
 | £3.68best £/GB | £58.93▼ 66% | 16GB | CoreParts | Laptop | DDR4 | SO-DIMM 2133MHz | - | |
 | £4.94 | £79.00▼ 15% | 16GB | SK Hynix | Laptop | DDR4 | SO-DIMM 2400MHz | Unbuffered | |
 | £5.00 | £79.99 | 16GB | motoeagle | Laptop | DDR4 | SO-DIMM 2400MHz | Non-ECCUnbuffered | |
 | £5.00 | £80.00 | 16GB | SK Hynix | Laptop | DDR4 | SO-DIMM 2666MHz | Unbuffered | |
 | £5.31 | £85.00 | 16GB | GLOBAL MEMORY | Laptop | DDR4 | SO-DIMM 2133MHz | Unbuffered | |
 | £5.31 | £85.00 | 16GB | GLOBAL MEMORY | Laptop | DDR4 | SO-DIMM 2400MHz | Unbuffered |
About this kit
- Memory RAM Replacement for Synology D4ECSO-2666-16G & D4ES01-16G
- Compatible for Synology RackStation, FlashStation, DiskStation, and Deep Learning Video Analytics NVR NAS Server Models: FS1018, RS1221RP+, RS1221+, DS1821+, DS1621xs+, DS1621+, DVA3221, RS820RP+, RS820+, DS2419+II, DS2419+, DS1819+, DVA3219, DS3018xs, DS1618+, DS3617xsII, DS3617xs, DS3622xs+, DS2422+
- Backed by A-Tech's Limited Lifetime Warranty + Friendly tech support team available to help before and after your purchase
- Single 16GB RAM Module | DDR4 SO-DIMM 260-Pin | Speeds up to 2666MHz (2667MHz), PC4-21300 / PC4-2666V
- ECC Unbuffered | 2Rx8 - Dual Rank | JEDEC DDR4 standard 1.2V
An A-Tech Memory (RAM) upgrade is an easy, quick way to boost your system's performance by speeding up loading times, improving system responsiveness, and increasing your system's ability to handle higher workloads. Take on more and multitask with ease with a simple and affordable A-Tech Memory upgrade! High Performance Memory RAM Replacement for Synology D4ECSO-2666-16G & D4ES01-16G Compatible with Synology RackStation, FlashStation, DiskStation, and Deep Learning Video Analytics NVR NAS Server Models: FS1018, RS1221RP+, RS1221+, DS1821+, DS1621xs+, DS1621+, DVA3221, RS820RP+, RS820+, DS2419+II, DS2419+, DS1819+, DVA3219, DS3018xs, DS1618+, DS3617xsII, DS3617xs, DS3622xs+, DS2422+ Memory Specs Memory Size: 16 GB ( 1 x 16 GB Module ) Memory Type: DDR4 Form Factor: SO-DIMM ( 260 Pin ) Speed: 2666 MHz / 2667 MHz ( PC4-21300 / PC4-2666V ) ECC Type: ECC Unbuffered Rank: 2Rx8 - Dual Rank x8 Voltage: 1.2V Ensured Reliability All A-Tech Memory products are rigorously tested to ensure that your memory meets our stringent quality and performance standards. Limited Lifetime Warranty Purchase with confidence knowing that all A-Tech orders are backed with our Limited Lifetime Warranty. US Based Technical Support Need help? Have questions? Our 5 star United States based support team is here to help before, during, and after your purchase to make sure you are completely satisfied with your A-Tech Memory!
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