Lenovo ThinkPad W550s 20E2000YUS 15.6" Laptop (2.40 GHz Intel Core i7-5500U, 8GB RAM, 500GB HDD, No Optical Drive, NVidia K620M, Windows 7 Pro 64-bit) Black Processor: Intel Core i7-5500U Dual Core Processor (4M, 2.4GHz - 3.0GHz) 15W Hard Drive: 500GB 7200rpm Hard Disk Drive RAM: 8GB DDR3 1600MHz 1.35V Display: 15.6" Full HD Display (1920x1080) Graphics: NVIDIA Quadro K620M 2GB