Sony VAIO VPC-EB4KFX/BJ 15.5" Notebook (2.66GHz Intel Core i5-480M 4GB RAM 500GB HDD DL DVD-RW Microsoft Windows 7 Professional 64-bit) Intel 2.66 GHz Core i5-480M processor up to 2.93 with turbo boost 4096MB RAM (8192MB max) 15.5 LED Backlight display(1366768) 500GB HDD (5400rpm) Windows 7 Professional operating system