8GB (4GBx2) Team High Performance Memory RAM Upgrade For Lenovo ThinkPad T510 Series W500 Series Laptop. The Memory Kit comes with Life Time Warranty. at Amazon.com
Refurbished: Lenovo Thinkpad T510 Notebook, Intel Core i5 520M 2.4Ghz, 8GB RAM, 240GB SSD Hard Drive, Windows 10 Pro x64 Laptops / Notebooks - Newegg.com