Lenovo ThinkPad W550s 20E20010US Notebook (Intel i7-5500U, 15.5-Inch 3K IPS Screen, NVIDIA Quadro K620M, 8GB, 256GB SSD Opal2, Intel 7265ac wifi and Bluetooth, Windows 7 Pro 64-bit) 5th Generation Intel Core i7-5500U processor (2.4 GHz base, 3 GHz Max Turbo, 4MB Cache) 15.5" 3K IPS Screen (2880x1620 resolution), 350 nits, 1000:1 contrast ratio 8GB RAM, 256GB SSD Opal2, Intel HD 5500 graphics in processor and NVIDIA Quadro K620M Graphics (2GB), 720p HD Webcam 6-cell 48Whr battery, 3-year Lenovo Worldwide Depot warranty (parts and labor), 1 year for the battery Windows 7 Pro 64-bit preinstalled through Windows 8.1 Pro Downgrade Rights, Intel 7265ac wifi and Bluetooth, Backlit Keyboard, Fingerprint Reader, TrackPoint and TouchPad