Hewlett Packard Compaq 283983-001, Socket 478, Intel Motherboard Supported Processors: Intel Pentium 4 1.8GHz, 478 Socket Supported Memory: 3 x DIMMs Video: AGP 8x Peripheral Interfaces: 1 - Parallel Port, 2 - DE-9 Serial Port, 1 - PS/2 Keyboard, 1 - PS/2 Mouse, 1 - Stereo, 1 - Line In, 1 - Mic, 2 - USB 2.0, 1 - LAN, 1 - MAC/MIDI/gameport/AUI/DA-15, 2 - USB 2.0