4GB DDR3 Memory RAM for Toshiba Satellite L505-ES5018 L645D-S4030 L645-S4038 L655D-S5050 L675D-S7017 M645-S4049 Capacity: 4GB (1 x 4GB) single piece module Speed: PC3-10600 DDR3-1333 (backward compatible to PC3-8500 DDR3-1066) Number of Pins: 204 Type: SODIMM Warranty: Lifetime