SK Hynix 4GB HMT451S6AFR8A-PB DDR3 1Rx8 PC3L-12800S Laptop Memory
Kuesuny 8GB Kit (2 x 4GB) DDR3-1600 SODIMM, DDR3L PC3-12800 CL11 Non ECC Unbuffered 204-Pin 1.35V/1.5V 2RX8 SO-DIMM Notebook Laptop RAM Memory at Amazon.com
Amazon.com: SK Hynix 4GB 2RX8 PC3-12800E 1600MHZ HMT351U7CFR8C-PB 00D4957 00D4955 47J0180 Compatible with IBM System x3100 M4 IBM System x3250 M4 : Electronics
PC3-10600 DDR3 1333 8GB Kit (2x4GB) RAM PC3 10600S 1333MHZ 2Rx8 204-pin 1.5v 4GB Memory Upgrade for Laptop at Amazon.com