Synology 32GB ECC DDR4 RDIMM MODULE FOR SA3400, FS3400, FS6400.

DDR Memory
For certain business-oriented NAS servers, Synology offers the ability to upgrade RAM capacity to reach a higher state of performance and reliability. The DDR RAM module have been customized and fine tuned by Synology engineers so they work fully with the servers and will greatly lower the chance of system crashing due to compatibility issues. For Flashstation FS3400, FS6400 and Rackstation SA3400.