---
product_id: 622558400
title: "A-Tech 16GB Compatible Replacement for Synology D4EC-2666-16G - DDR4 PC4-21300 2666 ECC Unbuffered UDIMM - Single NAS Server Memory RAM Stick (D4EC-2666-16G-ATC)"
brand: "a-tech"
price: "A$618"
currency: AUD
in_stock: true
reviews_count: 5
category: "A Tech"
url: https://www.desertcart.com.au/products/622558400-a-tech-16gb-compatible-replacement-for-synology-d4ec-2666-16g
store_origin: AU
region: Australia
---

# 2666MHz high speed 16GB DDR4 capacity ECC Unbuffered for error correction A-Tech 16GB Compatible Replacement for Synology D4EC-2666-16G - DDR4 PC4-21300 2666 ECC Unbuffered UDIMM - Single NAS Server Memory RAM Stick (D4EC-2666-16G-ATC)

**Brand:** a-tech
**Price:** A$618
**Availability:** ✅ In Stock

## Summary

> 🚀 Power your NAS like a pro — speed, stability, and support in one sleek stick!

## Quick Answers

- **What is this?** A-Tech 16GB Compatible Replacement for Synology D4EC-2666-16G - DDR4 PC4-21300 2666 ECC Unbuffered UDIMM - Single NAS Server Memory RAM Stick (D4EC-2666-16G-ATC) by a-tech
- **How much does it cost?** A$618 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.com.au](https://www.desertcart.com.au/products/622558400-a-tech-16gb-compatible-replacement-for-synology-d4ec-2666-16g)

## Best For

- a-tech enthusiasts

## Why This Product

- Trusted a-tech brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Reliable ECC Technology:** ECC Unbuffered memory reduces data corruption risks, keeping your critical server operations stable and secure.
- • **Boost Your NAS Performance:** Upgrade your Synology NAS with a powerful 16GB DDR4 RAM module for seamless multitasking and faster data handling.
- • **Optimized for Synology Models:** Perfectly compatible with a wide range of Synology RackStation, FlashStation, and SAN servers to ensure plug-and-play reliability.
- • **Lifetime Warranty & US Support:** Backed by A-Tech’s limited lifetime warranty and responsive US-based tech support for worry-free upgrades.
- • **Energy Efficient 1.2V Operation:** Runs at a low voltage to reduce power consumption and heat, extending your server’s lifespan and efficiency.

## Overview

The A-Tech 16GB DDR4 PC4-21300 RAM module is a high-performance, ECC unbuffered UDIMM designed as a direct replacement for Synology D4EC-2666-16G memory. Operating at 2666MHz with a 1.2V low voltage profile, it supports a broad range of Synology NAS and SAN server models, ensuring enhanced multitasking and system responsiveness. Rigorously tested and backed by a limited lifetime warranty plus US-based technical support, this memory upgrade guarantees reliable, long-term performance for professional-grade storage solutions.

## Description

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 D4EC-2666-16G & D4EU01-16GCompatible with Synology RackStation, Unified Controller, FlashStation, and Scalable, NAS & SAN Server Models:SA3200D, UC3200, RS4021xs+, RS3621xs+, RS3621RPxs, RS2821RP+, RS2421RP+, RS2421+, RS1619xs+, RS3618xs, RS2818RP+, RS2418RP+, RS2418+, RS4017xs+, RS3617xs+, RS3617RPxs, FS2500Memory Specs Memory Size: 16 GB ( 1 x 16 GB Module ) Memory Type: DDR4 Form Factor: DIMM ( 288 Pin ) Speed: 2666 MHz / 2667 MHz ( PC4-21300 / PC4-2666V ) ECC Type: ECC Unbuffered Rank: 2Rx8 - Dual Rank x8 Voltage: 1.2VEnsured ReliabilityAll A-Tech Memory products are rigorously tested to ensure that your memory meets our stringent quality and performance standards.Limited Lifetime WarrantyPurchase with confidence knowing that all A-Tech orders are backed with our Limited Lifetime Warranty.US Based Technical SupportNeed 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!

Review: Instalación fácil y sin error. Funcionando al 100
Review: Totalmente compatible con el synology DS720+ sin problema, esperemos el rendimiento con el tiempo que pase la prueba de uso

## Features

- Memory RAM Replacement for Synology D4EC-2666-16G & D4EU01-16G
- Compatible for Synology RackStation, Unified Controller, FlashStation, and Scalable, NAS & SAN Server Models: SA3200D, UC3200, RS4021xs+, RS3621xs+, RS3621RPxs, RS2821RP+, RS2421RP+, RS2421+, RS1619xs+, RS3618xs, RS2818RP+, RS2418RP+, RS2418+, RS4017xs+, RS3617xs+, RS3617RPxs, FS2500
- 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 DIMM 288-Pin | Speeds up to 2666MHz (2667MHz), PC4-21300 / PC4-2666V
- ECC Unbuffered UDIMM | 2Rx8 - Dual Rank | JEDEC DDR4 standard 1.2V

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B08VWJ4FVQ |
| Best Sellers Rank | #56,264 in Computers ( See Top 100 in Computers ) #423 in Computer Memory |
| Item model number | D4EC-2666-16G-ATC |
| Manufacturer | A-Tech |
| Product Dimensions | 13.34 x 3.12 x 0.38 cm; 30 g |

## Product Details

- **Brand:** A-Tech
- **Computer memory size:** 16 GB
- **Memory speed:** 2666 MHz
- **Ram memory technology:** DDR4

## Images

![A-Tech 16GB Compatible Replacement for Synology D4EC-2666-16G - DDR4 PC4-21300 2666 ECC Unbuffered UDIMM - Single NAS Server Memory RAM Stick (D4EC-2666-16G-ATC) - Image 1](https://m.media-amazon.com/images/I/717XQMtIHjL.jpg)

## Available Options

This product comes in different **Size, Style** options.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Review
*by A***O on 14 October 2023*

Instalación fácil y sin error. Funcionando al 100

### ⭐⭐⭐⭐⭐ Review
*by G***Z on 30 July 2024*

Totalmente compatible con el synology DS720+ sin problema, esperemos el rendimiento con el tiempo que pase la prueba de uso

### ⭐⭐⭐⭐⭐ Review
*by A***E on 23 April 2025*

It works with my Synology DS 1522+. Definitely cost saving vs getting from Synology brand. Worth every penny!

---

## Why Shop on Desertcart?

- 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016
- 🌍 **Shop Globally** — Access 737+ million products across 21 categories
- 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price
- 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members)
- 🔒 **Secure Payments** — Trusted payment options with buyer protection
- ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews

**Shop now:** [https://www.desertcart.com.au/products/622558400-a-tech-16gb-compatible-replacement-for-synology-d4ec-2666-16g](https://www.desertcart.com.au/products/622558400-a-tech-16gb-compatible-replacement-for-synology-d4ec-2666-16g)

---

*Product available on Desertcart Australia*
*Store origin: AU*
*Last updated: 2026-02-11*