SAMSUNG M471B5173QH0-YK0 SamSung 4GB 1Rx8 PC3L-12800S,1600Mhz, SODIMM-204P (MX15GARA-B6ND Please ensure that your original part number matches this exactly, or check with the manufactuer for compatiblity. Customers are responsible for compatiblity. Samsung 4GB PC3L-12800S DDR3 1600MHz SODIMM Laptop Memory RAM ... Samsung 4GB PC3L-12800S DDR3 1600MHz SODIMM Laptop Memory RAM ... This part is guaranteed to be fully functional, original and authentic.