Amazon.com: Lenovo ThinkPad T520 - Intel Core i7-2640m, 2.8GHz, 500GB HD, 4.0GB RAM, Windows 7 Professional 64-bit : Electronics
8GB Stick for IBM Lenovo ThinkPad T Series T420 T420i T420s T520 T520i. SO-DIMM DDR3 Non-ECC PC3-10600 1333MHz RAM Memory. Genuine A-Tech Brand. at Amazon.com
Lenovo ThinkPad T520 Review - StorageReview.com
Lenovo ThinkPad T520 Review - StorageReview.com
Lenovo ThinkPad T520 Review - StorageReview.com
A-Tech 8GB (2 x 4GB) RAM for Lenovo THINKPAD T520 4240 | DDR3 1333MHz SODIMM PC3-10600 204-Pin Non-ECC Memory Upgrade Kit at Amazon.com