Lenovo ThinkCentre M83 Desktop (10AM000AUS) Black (Discontinued by Manufacturer) 3.4 GHz Intel Core i7-4770 Processor (4 cores / 8 threads, 8 MB Cache); Intel HD Graphics 4600; Wi Fi feature can only be added separately via dongle 4 GB (32GB Max) DDR3-1600 SDRAM, 1 TB 7200 rpm SATA 6.0Gb/s Hard Drive, DVD-Writer 4 x USB 3.0, 4 x USB 2.0, VGA, 2 x DisplayPort, supports 3 independent displays Gigabit Ethernet, High Definition (HD) Audio, Internal Speaker (1 Watt), USB Keyboard and USB Optical Mouse Windows 7 Pro 64 preload w/ Windows 8 Pro 64 RDVD, License