Boost your Synology NAS performance with a single 4 GB DDR3 SO‑DIMM module, clocked at 1600 MHz (PC3‑12800) and CL11 latency. Unbuffered, non‑ECC memory is compatible with DS1515+, DS1815+, DS2015XS, DS2415+ and RS815/RS2416 models for faster data throughput and smoother multitasking.