HP Z220 D8D17UT Convertible Mini-tower Workstation - 1 x Intel Core i7 i7-3770 3.4GHz SMART BUY Z220 CMT I7-3770 3.4G 8GB 1TB DVDRW W7P 64BIT 8 GB RAM - 1 TB HDD - DVD-Writer - Intel HD 4000 Graphics - Genuine Windows 7 Professional 64-bit