Synology D4ES04-4G 4GB DDR4 ECC SODIMM Memory

At a Glance

• Official Synology 4GB DDR4 ECC memory
• Unbuffered SODIMM
• ECC error-correction support
• Designed for compatible current Synology NAS systems
• Supports selected 26-Series and 25-Series models
• Compatible with selected neo+ systems
• 5-Year Synology Limited Warranty

Important: Memory modules must match the requirements of the exact Synology NAS. Do not select memory solely by capacity or physical form factor.

Short Description

The Synology D4ES04-4G is a 4GB DDR4 ECC unbuffered SODIMM designed for compatible Synology NAS systems.

ECC memory can detect and correct certain memory errors, making this module particularly suitable for supported business and professional storage systems where data integrity and system stability are important.

Why Choose This Synology

ECC Memory Protection

Error-Correcting Code memory can detect and correct certain memory errors before they affect normal system operation.

Official Synology Upgrade

The D4ES04-4G is validated by Synology for specific NAS models rather than relying on generic third-party memory compatibility.

Upgrade as Your Workloads Grow

Adding memory gives supported DSM applications and services more system resources.

Supports Current Synology Platforms

The D4ES04-4G is listed for selected current 26-Series and 25-Series systems as well as several established 21-Series models.

Five-Year Warranty

Synology covers the module with a five-year limited warranty.

Best For

• Business NAS memory upgrades
• ECC-compatible DiskStation systems
• RackStation memory expansion
• Backup servers
• Multi-user storage
• Additional DSM applications
• Virtualisation-related workloads
• Growing NAS environments

Product Description

The Synology D4ES04-4G is a 4GB DDR4 ECC unbuffered SODIMM memory module designed for compatible Synology NAS systems.

ECC memory provides additional protection against certain memory errors, making it suitable for systems handling important business and shared data.

Synology publishes exact host-model compatibility for the D4ES04-4G and recommends using official Synology memory for optimal compatibility and reliability.

For systems supporting more than one memory module, Synology may require installed modules to be identical and share the same model number. Always follow the memory requirements of the specific NAS.

Key Features

• 4GB memory capacity
• DDR4
• ECC error correction
• Unbuffered SODIMM
• Official Synology memory
• Exact-model NAS compatibility
• Suitable for business storage
• 5-year warranty

What Do I Need With This Memory Module?

Required

• Compatible Synology NAS
• Available supported memory slot

Check the host NAS before purchase for:

• Maximum memory capacity
• Number of available slots
• Factory memory configuration
• Matching-module requirements

Compatible Synology Systems

Synology's current compatibility information includes:

26 Series

• RS1226RP+
• RS1226+
• RS826RP+
• RS826+

25 Series

• DS1825neo+
• DS1525neo+
• DS925+
• DS925neo+
• DS725+
• DS725neo+

21 Series

• RS1221RP+
• RS1221+
• DS1821+
• DS1621+

Compatibility Note: For multi-module configurations, Synology requires applicable installed memory modules to follow the configuration requirements of the specific NAS. Confirm the exact system before installation.

Specifications

What’s in the Box

• Synology D4ES04-4G 4GB ECC Memory Module × 1

Warranty

5-Year Synology Limited Warranty