HP Pro 3330 Microtower PC. Processor model: Intel Core i5-2500 (3.30 GHz, 6 MB cache, 4 cores), Motherboard chipset: Intel H61 Express. Memory slots: 2x DIMM. Discrete graphics adapter model: AMD Radeon HD 6450 (512 MB). Optical drive type: SATA SuperMulti DVD writer. Operating system provided: Windows 7 Professional 64