Upgrade your computer's performance with this set of two HyperX Genesis 2GB DDR3 SDRAM modules. The total capacity is 4GB, with each module having a capacity of 2GB. These modules are compatible with DIMM form factor and 240 pins. The bus speed is PC3-12800 (DDR3-1600), making it a valuable addition to any computer setup. The model number for these modules is KHX1600C9D3/4G, and they are manufactured by Kingston.