Operating System : Windows 10 Home & Pro MAR, Ubuntu Linux, Free DOS Chipset : Intel Q35 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 : Up to 1TB 7200 rpm Removable Media : EIDE DVD-ROM drive, EIDE DVD Writer Drive, EIDE Combo Drive (Slim-Line) Expansion Bays : External: One (1) 3.5-inch (SL), One (1) 5.25-inch (SL), Internal: One (1) 3.5-inch Expansion Slots : One (1) PCIe x16 LP, One (1) PCI LP Graphics : Integrated Intel Graphics Media Accelerator 3100 Audio : ADI 1984 High Definition Audio Communications : Intel 82566DM GbE Network Connector I/O Ports : Front: Two (2) USB 2.0, Audio I/O, Rear: Six (6) USB, Audio I/O, RJ-45, Parallel, Serial, VGA Input Devices : Standard Keyboard (USB) Power : 275 W Dimensions : 34 cm x 31.4 cm x 9.26 cm Weight : 6.80 kg