8GB DDR3 Memory RAM kit (2 x 4GB) for Acer Aspire 5742G 5742Z Memory Size: 8GB Kit (2 x 4GB) *There are two (2) 4GB DDR3 memory modules in this kit Memory Type: DDR3 SDRAM Number of Pins: 204 Memory Speed: PC3-8500 DDR3-1066 (1066MHz / 1067MHz) LIFETIME WARRANTY and free Tech Support