Qnap MHZ LONG-DIMM 288 PIN (RAM-16GDR4-LD-2133), 16GB, RAM-16GDR4-LD-2133, DDR4 SDRAM, 2133 MHz, DDR4-2133/PC4-17000, 288-pin, FF DIMM. The 16GB DDR4 2133 MHz DIMM Memory Module from QNAP upgrades the memory capabilities of your QNAP storage system, letting the native operating system run more apps at the same time.