Lenovo ThinkCentre M81 Tower

Mainboard Intel H61, Intel Core i3-3220 3.3GHz (2 Cores / 4 Threads, 5GT/s, 3MB, s.1155), 4GB DDR3 RAM, 250GB SATAIII HDD, BTX SFF Case, DVD-RW, Intel HD 2500, HD Sound, 8x USB 2.0, HDMI, Gigabit LAN, Windows 7 Professional

Mainboard Intel Q45, Intel Core 2 Duo E8400 3.0GHz (1333MHz FSB, 6MB, s.775), 4GB DDRII RAM, 250GB SATAII HDD, SFF Desktop Case, DVD-RW, Intel GMA 4500 (1GB max.), HD Sound, 8x USB 2.0, DisplayPort, eSATA, Gigabit LAN, Windows 7 Professional