HP Smart Buy Z640 Workstation; 925W 90% Efficient Chassis; Intel Xeon E5-2620v3 2.4 1866 6C CPU; 1 TB 7200 RPM SATA Hard Drive; 8GB DDR4-2133 (1x8GB) RegRAM; Slim SuperMulti DVDRW; HP USB Keyboard/USB Optical Mouse; NVIDIA Quadro K2200 4GB graphics; Windows 7 Professional 64 installed with Windows 8.1 Professional License; ENERGY STAR Qualified Configuration; Limited 3 years parts 3 years labor and 3 years onsite service (3/3/3) standard warranty.