HP Smart Buy Z620 Workstation; 800W 90% Efficient Chassis; Intel Xeon E5-2620 v2 2.10Ghz 15MB 1600 6C 1st CPU; 1TB 7200 RPM SATA 6G Hard Drive; 8GB DDR3-1866 ECC (2x4GB) Registered RAM; 16X SuperMulti DVDRW SATA ODD; HP Smart Buy USB Keyboard/USB Optical Mouse; NVIDIA Quadro K2000 2GB 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.