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 1TB Solid State Drive (optional) Removable Media : SATA DVD-ROM drive, SATA DVD Writer Drive, SATA Combo Drive CD-RW (Slim-Line) Expansion Bays : External: One (1) 5.25-inch (Slim-Line), One (1) 3.5-inch (Slim-Line), Internal: One (1) 3.5-inch Expansion Slots : One (1) PCIe x16 (LP), One (1) PCI (LP) Graphics : Integrated Intel GMA 4500 Audio : ADI 1984A High Definition Audio Codec Communications : Intel® 82567LM Gigabit Ethernet LAN 10/100/1000 I/O Ports : Front: Two (2) USB, microphone, headphone, Rear: Six (6) USB, Stereo line in, Speakers line out, VGA Input Devices : Dell USB Entry Keyboard, Dell USB Multimedia Pro Keyboard, Dell USB Entry Optical Mouse, Dell Laser Mouse Power : 235W Dimensions : 34 x 31.4 x9.26 cm Weight : 6.80 kg, 15 lbs