Dell XPS 15 UHD 15.6-Inch Touchscreen Laptop (Intel Core i7 4712HQ 2.3 GHz Processor, 16 GB RAM, 512 GB SSD,Windows 8.1 OS) Silver Intel Core i7 4712HQ 2.3 GHz Processor 16 GB DDR3L SDRAM; NVIDIA GeForce GT 750M 2GB GDDR5 512 GB SSD Storage; No Optical Drive 15.6 Inch UHD (3840x2160) LED-lit Touchscreen Windows 8.1 Operating System; Silver Chassis