NEMIX RAM 32GB DDR4 2666 CL19 ECC RDIMM Synology SA3400 memory upgrade

Synology SA3400 ECC RDIMM Upgrade

This NEMIX RAM module adds 32GB of DDR4 2666 ECC registered memory to a Synology SA3400 NAS. It arrives as a single 288-pin RDIMM rated at 1.2V with CL19 latency and a 2Rx4 rank configuration. The part number MR21300-324K1 confirms factory validation for the target platform.

IT Teams Maintaining SA3400 Units

The module suits administrators who need to expand the memory of a Synology SA3400 for virtualisation, file services or database workloads that benefit from error-correcting registered DIMMs. It is not intended for consumer desktops, laptops or unbuffered UDIMM slots, and it cannot be used in systems that require non-ECC or load-reduced memory.

32GB Single-DIMM Capacity Limit

The decisive specification is the 32GB capacity delivered on one RDIMM, which determines the maximum memory per slot on the SA3400. If the chassis has multiple slots, each can accept an identical module, but a single stick cannot exceed this density. Buyers must verify the platform's total slot count and maximum supported memory before ordering.