A-Tech 8GB Memory RAM for Asus/ASmobile X Series X75A-Xh51 - DDR3 1600MHz PC3-12800 Non ECC SO-DIMM 2Rx8 1.5V - Single Laptop & Notebook at Amazon.com
CMS 4GB (1X4GB) DDR3 12800 1600MHz Non ECC SODIMM Memory Ram Upgrade Compatible with Asus/Asmobile® X Series Notebook X75A, X75A-Xh51 - A20 at Amazon.com
A-Tech 8GB Memory RAM for Asus/ASmobile X Series X75A-Xh51 - DDR3 1600MHz PC3-12800 Non ECC SO-DIMM 2Rx8 1.5V - Single Laptop & Notebook at Amazon.com