Dell Studio s1557-7914CBK 1557 15.6-Inch Laptop (Black Chainlink) [Discontinued By Manufacturer] 1.6GHz Intel Core i7 720QM Processor 4GB System Memory 500GB Hard Drive; Dual Layer DVD Burner 15.6" Display; ATI RadeonHD 4570 Graphics Windows 7 Home Premium Operating System (64-bit)