Synology 4GB DDR4 ECC Unbuffered SODIMM RAM (D4ES01-4G)

The Synology 4GB DDR4 ECC memory module is engineered to deliver enhanced stability and data integrity for compatible Synology NAS systems. Featuring ECC (Error Correcting Code) technology, it automatically detects and corrects memory errors to ensure reliable, always-on operation. Fully tested and certified by Synology, this unbuffered SODIMM is ideal for entry-level upgrades, improving system reliability for file sharing, backups and essential business workloads.

FEATURES

• 4GB DDR4 ECC Memory – Improves system stability with automatic error correction
• DDR4 Performance – Efficient memory operation for everyday NAS workloads
• Unbuffered SODIMM Form Factor – Designed for compact Synology NAS platforms
• Synology Certified Module – Tested and validated for full compatibility
• Enhanced Data Integrity – Ideal for business-critical and always-on environments
• Reliable Memory Upgrade – Perfect for supported Synology NAS systems

APPLIED MODELS

• 21 Series: RS1221RP+, RS1221+, DS1821+, DS1621+