Operating System : Windows 10 Home & Pro MAR, Ubuntu Linux, Free DOS Chipset : Intel Q45 Express Processors : Intel Core 2 Duo, Core 2 Quad, Dual Core & Celeron Memory Support : Four (4) DIMM slots , Up to 8 GB DDR2 800 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 Combo Drive CD-RW 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 Communications : Intel 82567LM Gigabit1 Ethernet I/O Ports : Front: Four (4) USB, microphone, headphone, Rear: Six (6) USB 2.0, DP. VGA, Parallel, Serial, eSATA, Audio I/O, PS/2 Input Devices : Standard Keyboard, Mouse (USB or PS/2) Power : 305W Dimensions : 43.1 x 40.8 x 18.7 cm Weight : 11.5 kg