Overview

Synology D4ES04-4G DDR4 4GB ECC Memory Module
The Synology D4ES04-4G is a genuine 4GB DDR4 ECC Unbuffered SODIMM memory module designed to expand compatible Synology NAS systems. Built for reliable operation in business and professional storage environments, this memory upgrade helps improve multitasking performance, allowing supported NAS devices to handle more demanding workloads with greater efficiency.

Description

The Synology D4ES04-4G DDR4 4GB ECC Unbuffered SODIMM provides a dependable memory expansion solution for compatible Synology NAS devices. With error-correcting code (ECC) technology, it helps maintain data accuracy and system stability, making it suitable for storage environments where reliability is essential. This module is designed for easy integration with supported Synology NAS platforms, improving responsiveness when running multiple applications, services, and data-intensive tasks.

Features

Reliable Memory Upgrade for Synology NAS Systems
Adding additional memory to a compatible Synology NAS can improve system responsiveness, especially when running multiple services such as file sharing, virtualization applications, database workloads, surveillance tools, and productivity packages. The D4ES04-4G module is engineered specifically for Synology systems to ensure compatibility and dependable performance.

The ECC Unbuffered SODIMM design helps detect and correct certain memory errors, supporting improved system reliability for professional storage applications where consistent operation is important.

Compatibility with Synology NAS Devices
The Synology D4ES04-4G memory module is compatible with selected Synology Plus and RackStation NAS models, including:

• Synology DS925+
• Synology DS725+
• Synology RS1221RP+
• Synology RS1221+
• Synology DS1821+
• Synology DS1621+

Always confirm compatibility with your NAS model before installation to ensure optimal performance.

Technical Details
The Synology D4ES04-4G memory module provides the following specifications:

• Part Number / SKU: D4ES04-4G
• Memory capacity: 4GB
• Memory type: DDR4 ECC Unbuffered SODIMM
• Designed for Synology NAS systems
• Supports improved stability for demanding storage workloads
• Suitable for compatible 21 series and 25 series Synology NAS platforms

Improve NAS Performance and Multitasking
A memory upgrade can help compatible Synology NAS systems manage more simultaneous tasks with smoother performance. Users running multiple applications, larger file operations, business services, or advanced NAS features can benefit from increased available memory capacity.

The Synology D4ES04-4G is an ideal choice for users looking for a compatible, reliable memory expansion option that maintains Synology system stability while improving overall efficiency.

Ideal Applications
This 4GB DDR4 ECC memory module is suitable for:

• Business file storage environments
• NAS systems running multiple applications
• Virtual machine and container workloads
• Surveillance storage solutions
• Professional data management systems

Specifications

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Specifications
Product Code	D4ES04-4G
Hardware Specifications
Description	DDR4 ECC Unbuffered SODIMM
Capacity	4GB
EAN	4711174726448
Compatibility
Applied Models	25 series:DS925+, DS725+
	21 series:RS1221RP+, RS1221+, DS1821+, DS1621+