HP Smart Buy Z440 Workstation; 525W 85% Efficient Chassis; Intel Xeon E5-1607v3 3.1 10M 1866 4C CPU; 500GB 7200 RPM SATA Hard Drive; 4GB DDR4-2133 (1x4GB) RegRAM; Slim SuperMulti DVDRW; HP USB Keyboard/USB Optical Mouse; NVIDIA Quadro K420 1GB 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.