HP Compaq DC7800 SFF Desktop Intel Core 2 Duo 3.0 GHz 8 GB DDR2 RAM 500 GB HD DVD-RW WiFi Bluetooth Windows 7 Professional 64-Bit Microsoft Windows 7 Professional 64-Bit pre-installed w/CoA Intel Core 2 Duo E8400 3.0 GHz processor, Intel Q35 Express chipset 8 GB of DDR2 RAM, DVD-RW drive DVD-RW WiFi