QNAP RAM4GDR3LSO1600 Superior quality, Internal memory 4 GB, DDR3, Speed 1600 MHz, Component for PC/server, 204-pin SO-DIMM, Memory layout (modules x size) 1 x 4 GB, Green. These memory modules must perform properly to ensure maximum performance. Delivers superior quality, performance, and 100% compatibility with the computing system the module is designed for.