Synology 16GB DDR4 2666 MHz RDIMM Memory Module

Overview

The Synology D4RD-2666-16G is a 16GB DDR4 registered DIMM memory module designed to enhance the performance of select Synology NAS models such as the FS6400, FS3400, and SA3400. Operating at 2666 MHz, it delivers faster data processing and improved system responsiveness. Equipped with ECC technology, this module helps maintain data integrity by detecting and correcting memory errors automatically, which is crucial for reliable NAS operation under heavy workloads.

Its 288-pin design and low 1.2V power consumption make it an efficient upgrade that balances performance with energy savings. This memory module is ideal for users handling large files, running multiple applications, or seeking to minimize system delays in both professional and home server environments.

Key features

• 16GB DDR4 memory tailored for Synology NAS systems to ensure compatibility and stability
• 2666 MHz speed that enhances data access times and overall system responsiveness
• Error-correcting code (ECC) support that automatically detects and fixes common memory errors to protect data accuracy
• Registered DIMM (RDIMM) format with 288 pins for reliable and consistent performance in server environments
• Low voltage operation at 1.2V to reduce power consumption without sacrificing speed
• Designed specifically for Synology FS6400, FS3400, and SA3400 models, ensuring seamless integration

Key specs

• Memory capacity: 16 GB
• Memory type: DDR4 RDIMM
• Speed: 2666 MHz
• Pin count: 288 pins
• Voltage: 1.2 V
• ECC support: Yes
• Compatible models: Synology FS6400, FS3400, SA3400

Compatibility and installation

This memory module is designed to work exclusively with specific Synology NAS models, ensuring optimal performance and stability. For best results, it is recommended to install memory modules of the same size and speed together. The registered DIMM format supports server-grade reliability, making it suitable for environments where data integrity and uptime are critical.

Installation is straightforward for users familiar with NAS hardware upgrades, and the module’s low power requirements help maintain efficient operation without increasing energy costs significantly.

Who should consider this memory upgrade

This Synology 16GB DDR4 2666 MHz RDIMM is a strong choice for IT professionals and home server users who need to boost their NAS performance for demanding tasks such as large file transfers, virtualization, or running multiple simultaneous applications. It fits well in setups where data accuracy and system stability are priorities, helping to reduce delays and maintain smooth operation under heavy workloads.