The G.Skill PC3-10666 4 x 2 GB DIMM 1333 MHz DDR3 SDRAM Memory module is a high-performance memory kit designed for computers that require speed and capacity. With a total capacity of 8GB spread across 2 modules, each with a capacity of 4GB, this memory upgrade is ideal for improving the overall performance of your system. The DDR3 SDRAM technology and 1333 MHz bus speed ensure fast and efficient data processing, making it a reliable choice for demanding applications and gaming.