Qnap RAM-4GDR3-SO-1600, Memory 4 GB, DDR3 SDRAM, Modules 1 x 4 GB, Standard DDR3-1600/PC3-12800, Number of 204 pin. The QNAP RAM-4GDR3-SO-1600 perform properly to ensure maximum performance. Delivers superior quality, performance, and 100% compatibility with the computing system the module is designed for.