HP Smart Buy Z230 Tower Workstation; Tower 400W 92% Efficiency Chassis; Intel Xeon E3-1226v3 3.3 8M GT2 4C CPU; 1TB 7200 RPM SATA Hard Drive; 4GB DDR3-1600 ECC (1x4GB) Unbuffered RAM; Slim 8X SuperMulti DVDRW SATA ODD; HP USB Keyboard/USB Optical Mouse; Intel HD Graphics P4600; Windows 7 Professional 64 installed with Windows 8.1 Professional License; HP ENERGY STAR Qualified Configuration; Limited 3 years parts 3 years labor and 3 years onsite service (3/3/3) standard warranty.