Pacific Sun Memory 8 GB Kit DDR3 PC3-12800 1600 MHz Laptop Memory (2) X51642736P-000 100% Compatible with all Major Systems. ( Apple, Dell, Lenovo, Toshiba, etc.) 8GB (2x4GB) DDR3 SDRAM - DIMM 204-pin Non-ECC, Unbuffered 1600 MHz (PC3-12800) 1.35V Crucial Equivalent P/N: CT2KIT51264BF160B Limited Lifetime Warranty