This is a G.Skill 4GB DDR3 SDRAM Dual Channel kit with a capacity of 2GB per module. It features a timing of 9-9-9-24 and has an operating voltage of 1.5V. The RAM modules are 240 pin, unbuffered and with a bus speed of PC3-10600 (DDR3-1333). The kit comprises of 2 modules with a total capacity of 4GB.