Lenovo ThinkCentre M900z (10F3-00SUS) 3.2GHz 4GB Desktop Specs- Monitor: 23.8in CPU Speed: 3.2GHz Memory: 4GB Hard Drive: 500GB Graphics Card: Intel HD Graphics 530 Operating System: Windows 7 Professional 10F30005US. This desktop is brand new in open box and will come exactly as pictured. We guarantee it not DOA!