Operating System : Windows 10 Home & Pro MAR, Ubuntu Linux, Free DOS Chipset : Intel G31 (ICH7) Processors : Intel Core 2 Duo & Celeron Memory Support : Two (2) DIMM slots , Up to 4 GB DDR2 800MHz SDRAM  Hard Drive : 160MB to 1 TB , 64GB to 1TB Solid State Drive (optional) Removable Media : 3.5" 1.44MB FDD, 48X CD-ROM, 16X DVD-ROM, 48X32 CDRW/DVD Combo, 16X DVD+/-RW Expansion Bays : External: One (1) 3.5-inch, Two (2) 5.25-inch, Internal: Two (2) 3.5-inch Expansion Slots : Two (2) PCI, One (1) PCIe x16 Native Graphics : Integrated Intel® Graphics Media Accelerator 3100 Audio : ADI 1984 High Definition Audio Communications : Broadcom (BCM5784M) Gigabit LAN 10/100/1000 I/O Ports : Front: Two (2) USB, microphone, headphone, Rear: six (6) USB, Parallel, VGA, Serial, RJ45, Stereo line in, Speakers line out Input Devices : Standard Keyboard, Mouse (USB) Power : 255W Dimensions : 43.9 x 41.4 x 18.5 cm Weight : 12.34 kg