HP Compaq 4000 Pro Small Form Factor PC. Processor model: Intel Core2 Duo E8400 (3.00 GHz, 6 MB L2 cache, 1333 MHz FSB), Motherboard chipset: Intel B43 Express. Memory slots: 2x DIMM. Discrete graphics adapter model: Integrated Intel Graphics Media Accelerator 4500. Optical drive type: SATA SuperMulti DVD writer. Operating system provided: Windows 7 Professional 64