OWC 16GB DDR4 2666 ECC Registered RDIMM D4RD-2666-16G RS18017xs+ server RAM

Server-grade DDR4 ECC Registered DIMM

This 16GB DDR4 2666 MHz module is built for servers, workstations and compatible NAS systems that require registered ECC memory. It operates at 1.2V with CL19 latency and a 2Rx4 rank configuration on a 288-pin form factor. The part is designed as a direct upgrade for the Synology RackStation RS18017xs+ and matches OEM specifications.

Fits registered ECC memory slots only

The module must be installed in a platform that supports DDR4 registered ECC DIMMs; it will not work in standard desktop computers or alongside unbuffered or load-reduced ECC memory. Backward compatibility with 2133 MHz and 2400 MHz bus speeds allows it to slot into older DDR4 server boards without configuration changes. A single 16GB stick leaves remaining DIMM slots free for further capacity expansion.

JEDEC and RoHS compliant build

Full compliance with JEDEC standards and RoHS directives means the upgrade is warranty-safe for the host system. OWC validates every module in-house, providing a limited lifetime warranty with free technical support and an advanced replacement program. No heat spreader is included, ensuring clearance in dense server chassis.