Kingston 4GB 1600MHz DDR3 1600 Memory Module for Toshiba (PC3 12800) KTT-S3C/4G Kingston - Memory - 4 GB - SO DIMM 204-pin - DDR3 - 1600 MHz for Toshiba Satellite L850, L850-13, L855-11, P850-030, P850-04 P850-040, P870-023, P870-027