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Synology

Synology D4NS2133-4G 4GB DDR3 SO-DIMM RAM Module

Synology-certified 4GB DDR3 SO-DIMM memory module for boosting NAS multitasking performance and application responsiveness.

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Overview

The Synology D4NS2133-4G is a 4GB DDR3 SO-DIMM memory module running at 2133MHz, designed specifically for use in compatible Synology NAS (Network Attached Storage) devices. As an official Synology-branded component, it has been tested and validated to work reliably within Synology's hardware ecosystem, ensuring stable operation and full compatibility with the DiskStation Manager (DSM) operating system. This matters because NAS devices often run continuously and handle critical data storage tasks where memory-related instability can lead to service interruptions or data integrity concerns.

Adding this 4GB module to a compatible Synology NAS improves the system's ability to handle concurrent tasks — whether that means running Docker containers, hosting a Surveillance Station with multiple camera feeds, serving files to multiple users, or maintaining efficient read/write caching. The SO-DIMM form factor is designed for the compact memory slots found in Synology's desktop NAS units, and installation typically involves opening the NAS enclosure and inserting the module into an available slot. While third-party DDR3 modules may work in some Synology models at a lower cost, the official module removes guesswork about compatibility and preserves the manufacturer's support and warranty terms.

Key Features

Applied model: DS1618+

Warranty: 3 Year

For expanding your Synology NAS server's memory capacity

Specifications

Capacity
4GB
Memory Type
DDR3 SO-DIMM
Speed
2133MHz
Module Count
1
Brand
Synology
Model
D4NS2133-4G

Frequently Asked Questions

The D4NS2133-4G is designed for Synology NAS units that support DDR3 SO-DIMM memory at 2133MHz. Check Synology's compatibility list for your specific NAS model before purchasing, as not all models accept this module.
Synology-branded modules are tested and validated for compatibility with Synology NAS hardware. Using third-party RAM can sometimes cause stability issues or may not be recognized by the system, and it may affect your Synology warranty coverage.
Additional RAM in a Synology NAS allows smoother operation when running multiple packages (such as Surveillance Station, Docker, or virtual machines), speeds up file indexing, and improves caching performance for frequently accessed data.
This is a single 4GB DDR3 SO-DIMM module. If your NAS has multiple memory slots and you need more than 4GB, you would need to purchase additional modules separately.

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