8GB (2X4GB) Ram For IBM Lenovo Thinkpad T500, W500 Series DDR3 Notebook Memory | eBay
4GB Team High Performance Memory RAM Upgrade Single Stick For Lenovo ThinkPad T510 Series W500 Series Laptop. The Memory Kit comes with Life Time Warranty. at Amazon.com
8GB 2X4GB Memory RAM for Lenovo ThinkPad W Series W500 204pin 1066MHz PC3-8500 DDR3 SO-DIMM Black Diamond Memory Module Upgrade System Specific Memory - Newegg.com