Lenovo ThinkPad Edge E550 20DF

Core i7 5500U / 2.4 GHz
Windows 7 Pro 64-bit / Windows 8.1 Pro 64-bit downgrade
pre-installed: Windows 7
8 GB RAM
500 GB HDD
DVD-Writer
15.6″ 1920 x 1080 ( Full HD )
AMD Radeon R7 M260
802.11ac