The Corsair XMS3 DDR3 RAM 4GB (2 x 2GB) CMX8GX3M4A1600C9 is a high-quality memory module designed for computers that require fast and reliable performance. With a total capacity of 4GB spread across 2 modules, each with a capacity of 2GB, this DDR3 SDRAM memory is perfect for boosting the speed and efficiency of your system. The DIMM form factor, along with 240 pins and a bus speed of PC3-12800 (DDR3-1600), ensures compatibility and compatibility with a wide range of older computer systems.