Lenovo ThinkPad W540 20BG0011US 15.6" LCD Mobile Workstation - Intel Core i7 i7-4700MQ Quad-core (4 Core) 2.40 GHz - 8 GB DDR3L SDRAM - 500 GB HDD - Windows 7 Professional 64-bit upgradable to Windows 8 Pro - 1920 x 1080 - Black

This portable 15.6" workstation is the thinnest and lightest in its class, yet sacrifices nothing in terms of speed, power, and durability. Graphics-intensive, ISV-certified applications with blazing-fast processing and advanced graphics technology, plus ThinkPad's known reliability, mean you can handle any heavy-computational task from anywhere you want to be.