Lenovo Z510 Laptop Intel Core i7-4700MQ (2.40GHz 1600MHz 6MB) 4.0GB 500GB WINDOWS 8 Processor - 4th Generation Intel Core i7-4700MQ (2.40GHz 1600MHz 6MB) Operating System - Windows 8.1 64 Memory - 4.0GB PC3-12800 DDR3L SDRAM 1600 MHz ; Hard Drive - 500GB 5400 RPM Bluetooth:Bluetooth Version 4.0; Optical Drive:DVD Recordable (Dual Layer)