Dell OptiPlex 580 Athlon II X2 B26 3.2GHz 4GB 250GB DVD&plusmn;RW Radeon HD 3450 Win 7 Pro Mini-Tower PC Mini-Tower form factor AMD Athlon II X2 B26 3.2 GHz dual-core processor, AMD 785G chipset 4 GB DDR3 RAM (16 GB maximum), 250 GB SATA hard drive, DVDRW SATA drive AMD Radeon HD 3450 256 MB PCI Express video card, 10/100/1000 Gigabit Ethernet LAN Microsoft Windows 7 Professional pre-installed w/CoA