Lenovo ThinkPad W520 15.6 Inch Laptop | Configure To Order
CMS 32GB (4X8GB) DDR3 10600 1333MHZ Non ECC SODIMM Memory Ram Upgrade Compatible with Lenovo® Thinkpad W520 Quad Core 4270 4276, 4282, 4284 - C12 at Amazon.com
Lenovo W520 - DDR3 SODIMM and Intel 310 mSATA SSD Install | Kevin J Morse.ca
4GB Memory RAM for Lenovo ThinkPad W Series W500, W500 (4061B15), W500 (4061B13), W520, W700 204pin PC3-8500 1066MHz DDR3 SO-DIMM Black Diamond Memory Module Upgrade System Specific Memory - Newegg.com