Operating System : Windows 10 Home & Pro MAR, Ubuntu Linux, Free DOS Chipset : Intel Q45 Express Chipset w/ICH10DO Processors : Intel Core 2 Duo, Core 2 Quad Memory Support : Four (4) DIMM slots , Up to 16 GB DDR3 1333 MHz SDRAM  Hard Drive : 160MB to 1 TB , 64GB to 3TB Solid State Drive (optional) Removable Media : DVD-ROM/ DVD-ReWritable Expansion Bays : External: One (1) 3.5-inch, Two (2) 5.25-inch, Internal: One (1) 3.5-inch Expansion Slots : One (1) PCIe x16, One (1) PCIe x1, Two (2) PCI Graphics : Integrated Intel GMA 4500 Audio : ADI 1984A High Definition Audio Codec Communications : Intel 82567LM GbE Network Connection I/O Ports : Front: Two (2) USB, Audio I/O, Rear: Six (6) USB 2.0, Audio I/O, VGA, Parallel, Serial, DP, RJ-45, eSATA Input Devices : Standard Keyboard (orUSB) Power : 305 W Dimensions : 43.3 cm x 40.8 cm x 18.7 cm Weight : 11.7 kg