The CMP16GX3M4A1333C9 computer memory by Corsair is a set of 4 DDR3 SDRAM modules with a total capacity of 16 GB. This memory is ideal for upgrading or replacing existing RAM modules in a computer to improve performance and increase capacity. With the trusted Corsair brand and reliable DDR3 technology, this memory is a dependable choice for enhancing the speed and efficiency of a computer system.