Refurbished: ThinkPad Laptop T420 Intel Core i5 2nd Gen 2520M (2.50 GHz) 4 GB Memory 320 GB HDD Intel HD Graphics 3000 14.0" Windows 7 Professional 64-Bit - Newegg.com
Lenovo ThinkPad L512 Ram UpGrade - YouTube
4GB DDR3-1333 (PC3-10600) Memory RAM Upgrade for The Lenovo ThinkPad L512 at Amazon.com
CMS 8GB (2X4GB) DDR3 10600 1333MHZ Non ECC SODIMM Memory Ram Upgrade Compatible with Lenovo® Thinkpad L412, L420, L512, L520 Ddr3-1333 - A29 at Amazon.com
4GB DDR3-1333 (PC3-10600) Memory RAM Upgrade for The Lenovo ThinkPad L512 at Amazon.com
Lenovo ThinkPad L512 Ram UpGrade - YouTube
How To Upgrade the Ram in a Lenovo ThinkPad - YouTube
16GB KIT (2 x 8GB) for IBM Lenovo ThinkPad L Series L412 L420 L512 L520. SO-DIMM DDR3 Non-ECC PC3-10600 1333MHz RAM Memory. Genuine A-Tech Brand. at Amazon.com
CMS 16GB (2X8GB) DDR3 10600 1333MHZ Non ECC SODIMM Memory Ram Upgrade Compatible with Lenovo® Thinkpad T420 4177, 4178, 4180, 4236 Series - A13 at Amazon.com
ThinkPad Laptop L Series Intel Core i5 1st Gen 520M (2.40GHz) 2GB Memory 320GB HDD Intel HD Graphics 15.6" Windows 7 Professional 64-bit L512 (4444-34U) - Newegg.com