HP Compaq Elite 8300 Convertible Minitower PC (ENERGY STAR). Processor family: Intel, Processor model: Intel Core i7-3770 with Intel HD Graphics 4000 (3.40 GHz, 8 MB cache, 4 cores), Motherboard chipset: Intel Q77 Express. Maximum internal memory: 32 GB, Memory slots: 4 DIMM, Memory clock speed: 1600 MHz. Discrete graphics adapter model: Integrated Intel HD Graphics 4000. Optical drive type: SATA SuperMulti DVD writer. Operating system installed: Windows 7 Professional 64 (available through downgrade rights from Windows 8 Pro 64)