SK Hynix HMT451S6DFR8A 8GB (2x4GB) 1Rx8 DDR3 SO-DIMM PC3L-12800S 1600MHz 204-Pin Non-ECC CL11 1.35V Laptop Memory 2-Piece Kit HMT451S6DFR8A-PB for Other Laptop Systems at Amazon.com
Samsung Laptop Memory 4GB 1Rx8PC3L-12800S-11-13-B4 M471B5173QH0-YK0 at Amazon.com