16GB (2 X 8GB) RAM Memory for Lenovo ThinkPad T520 4239, 4240, 4241, 4242, 4243 | eBay
How to upgrade RAM memory in Lenovo ThinkPad T510 laptop - YouTube
16GB KIT (2 x 8GB) 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
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
Tuning the Lenovo T520 - Upgrading Memory and Installing an mSATA SSD • Helge Klein
Tuning the Lenovo T520 - Upgrading Memory and Installing an mSATA SSD • Helge Klein