Lenovo W510 Intel Core i7 Q820 CPU @ 1.73GHz, 4GB RAM, 250GB HDD with Microsoft Windows 10 Professional and Microsoft Office 2010 Home & Business.
8GB (4GBx2) Team High Performance Memory RAM Upgrade For Lenovo ThinkPad W510 Series W700 Series Laptop. The Memory Kit comes with Life Time Warranty. at Amazon.com
Lenovo ThinkPad W510 i7-720QM 16GB RAM 240 SSD Win 7 Ready to Use | eBay