A-Tech 16GB DDR4 2666MHz ECC RDIMM CL19 1.2V 2Rx8 Server Memory

16GB DDR4 ECC RDIMM for Synology

This 16GB DDR4 2666MHz registered ECC module uses a 288-pin DIMM form factor and runs at 1.2V with CL19 latency. It is built with major-brand chips and validated as a direct replacement for the Synology D4RD-2666-16G part. The single-rank 2Rx8 design targets server and workstation workloads.

Check motherboard support for registered ECC DDR4

Before ordering, confirm that your system accepts registered ECC DDR4 DIMMs at 2666MHz and 1.2V. Many consumer boards only support unbuffered non-ECC memory, so the module will not function if the platform requires unbuffered DIMMs. Consult the vendor's qualified-vendor list or manual to verify the exact part number is listed.

Fits servers and workstations needing registered ECC

The registered buffer reduces electrical load on the memory controller, allowing larger total capacities in multi-slot chassis. ECC capability detects and corrects single-bit errors to protect data integrity in critical applications. The module requires a platform designed for registered DDR4 DIMMs; it will not work in systems limited to unbuffered memory.