HP Z230 Tower Workstation; Tower 320W Standard Efficiency Chassis; Intel Core i5-4590 3.3 6M GT2 4C CPU; 1TB 7200 RPM SATA Hard Drive; 4GB DDR3-1600 non-ECC (1x4GB) Unbuffered RAM; Slim 8X SuperMulti DVDRW SATA ODD; HP USB Keyboard/USB Optical Mouse; Intel HD Graphics 4600; Windows 7 Professional 64 installed with Windows 8.1 Professional License; Limited 3 years parts, 3 years labor, and 3 years onsite service (3/3/3) standard warranty.