Acer D4RD-2666-16G 16GB DDR4 2666MHz ECC Registered DIMM

The Acer D4RD-2666-16G is a 16GB DDR4 registered DIMM rated at 2666MHz (PC4-21300) and designed for enterprise storage and server applications. Its ECC capability continuously monitors data for single-bit errors and corrects them on the fly, while the registered (buffered) architecture reduces electrical load on the memory controller — both critical features for systems that must run reliably around the clock. Operating at the DDR4-standard 1.2V, it keeps power draw and heat generation in check even in multi-DIMM configurations.

This module is specifically validated for Synology's enterprise NAS platforms, including the SA3400 rackmount storage server and the FlashStation FS3400 and FS6400 all-flash arrays. Adding memory to these units allows them to handle larger file caches, more concurrent users, and heavier virtualization or container workloads. The 288-pin DIMM form factor makes installation a straightforward slot-in process with no additional hardware or adapters required. For administrators expanding Synology enterprise deployments, this module provides a tested and compatible path to increased system memory.