Operating System : Windows 10 Home & Pro MAR, Ubuntu Linux, Free DOS Chipset : Intel Q35 Express Chipset (ICH9DO) 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 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) PCIe x16 LP, Two (2) PCI LP Graphics : Integrated Intel Graphics Media Accelerator 3100 Audio : ADI 1984 High Definition Audio Communications : Gigabit Ethernet I/O Ports : Front: Two (2) USB, microphone, headphone, Rear: Six (6) USB, Paralle,, VGA, Serial, Stereo line in, Speakers line out Input Devices : Dell USB Entry Keyboard, Dell USB Multimedia Pro Keyboard, Dell USB Entry Optical Mouse, Dell Laser Mouse Power : 280W Dimensions : 39.9 x 35.3 x 11.4 cm Weight : 8.26 kg