OptiPlex 9020 Desktop Computer - Intel Core i5 i5-4570S 2.90 GHz - Ultra Small Dell Optiplex 9020 Desktop Computer - Intel Core I5 I5-4570s 2.90 Ghz - Ultra Small - 4 Gb Ram - 320 Gb Hdd - Dvd-writer - Intel Hd 4600 - Windows 7 Professional 64-bit