The Corsair CMX8GX3M2A1333C9 XMS3 DDR3 DIMM 1333MHz 8GB RAM Kit includes two modules of 4GB each, totaling 8GB of memory. These DDR3 SDRAM modules are designed for high performance, with a bus speed of 1333MHz. The DIMM form factor and 240 pins make them compatible with a wide range of motherboards. Manufactured by Corsair, a trusted brand in computer components, this RAM kit is a reliable choice for improving the speed and efficiency of your system.