Operating System : Windows 10 Home & Pro MAR, Ubuntu Linux, Free DOS Chipset : Intel Q75 Express chipset Processors : Intel Core i3 2nd and 3rd Gen Memory Support : Four (4) DIMM slots , Up to 32 GB DDR3 1600 MHz SDRAM  Hard Drive : 160MB to 1 TB , 64GB to 1TB Solid State Drive (optional) Removable Media : SATA DVD-ROM drive, SATA DVD Writer Drive, SATA Blu-ray Writer Drive Expansion Bays : External: One (1) 3.5-inch, One (1) 5.25-inch, Internal: One (1) 3.5-inch Expansion Slots : One (1) low-profile PCI, One (1) low-profile PCI Express x16, Two (2) low-profile PCI Express x1 Graphics : Intel HD Graphics: Basic, 2000, 2500, 4000 Audio : High Definition Audio with Realtek ALC221 codec Communications : Integrated Intel 82579LM Gigabit Ethernet I/O Ports : Rear: (4) USB 3.0, (2) USB 2.0, Serial, VGA, DP, 2 PS/2, audio in/out, Front: (4) USB 2.0, audio ports Input Devices : Standard Keyboard Mouse(PS/2 or USB) Power : 240W Dimensions : 100 x 338 x 379 mm Weight : 7.6 kg