HPE 726719-B21 is a HPE 16GB (1X16GB) PC4-17000 DDR4-2133MHZ SDRAM for Gen8 and Gen9 Servers. When you choose HP SmartMemory you get the same high quality, reliability, and confidence that come with your HP ProLiant Gen9Server series. DRAM quality and reliability are more important now than ever. Industry trends such as server virtualization, cloud computing, the use of large database applications and high-performance computing have all increased the need for higher capacity memory with greater reliability and uptime. HP SmartMemory is unique technology was introduced in ProLiant Gen8 Servers and in ProLiant Gen9 Servers it unlocks certain features available only with HP Qualified Server memory. HP SmartMemory enables ProLiant Gen9 systems to reliably identify and verify whether installed memory has passed the rigorous HP qualification and testing processes. And because the memory is authenticated, extended memory performance features can be enabled through the system ROM.