Toshiba 8GB (1 x 8GB) PC3L-12800 DDR3L-1600MHz SODIMM Notebook Memory [PN: PA5104U-1M8G] Based upon your needs and the types of applications you use on your computer, including the configuration of your devices and peripherals, the amount of memory needed will vary. Installing the maximum amount of memory in the slots will give you the best overall system performance. Please check your user manual to ensure compatibility or contact us for verification. 1 x 8GB DDR3L-1600 PC3L-12800 204 Pin Sodimm 1.35 Volt