Synology 8GB DDR4 ECC SO-DIMM NAS Memory (D4ES03-8G)

The Synology 8GB DDR4 ECC SO-DIMM NAS module (part number D4ES03-8G) is designed for network attached storage systems. Its ECC design helps keep data accurate under continuous load. It is built for Compatible Synology NAS models (check Synology’s compatibility list). Installation takes only a few minutes.

More memory for a more capable NAS.

More Memory for Your NAS Workloads

A NAS running many users, containers, virtual machines or caching runs short of memory quickly, which slows file access and background tasks.

This 8GB DDR4 ECC SO-DIMM module adds capacity for file services, apps and virtualisation on compatible Synology NAS systems.

Specifications That Match Your System

Key specs: DDR4, 260-pin, SODIMM, 1.2V. Match the memory type, form factor and speed your system supports.

Error Correction and Stability

ECC memory corrects single-bit errors automatically, which helps prevent crashes and silent data corruption in systems that run around the clock.

Setup Instructions

How to Install the Memory

1. Shut down the NAS from its management interface and unplug the power cable.
2. Open the memory slot cover as described in the NAS hardware guide.
3. Insert the module, aligning the notch, until it clicks into place.
4. Close the cover, power on and confirm the new memory size in the NAS system information.