Panasonic Toughbook 54 Lite 14" Notebook, 4 GB RAM, 500 GB HDD, Black/Silver (CF-54A2900CM) Operating system: win 8.1 Pro / win 7 Pro downgrade - pre-installed: win 7 Pro Processor: Intel Core i5 (5th Gen) 5300U / 2.3 GHz ( 2.9 GHz ) / 3 MB cache Memory: 4 GB DDR3L