Operating System : Windows 10 Home & Pro MAR,Ubuntu Linux, Free DOS Chipset : Intel G45 Express Processors : Intel Core 2 Duo, Intel Core 2 Quad, Intel Pentium, Intel Celeron Memory Support : Two (2) DIMM slots , Up to 4 GB DDR2 Hard Drive : Up to 1TB 7200 rpm or Solid State Drive (optional) Removable Media : DVD-ROM drive, SATA DVD Writer Drive, SATA Blu-ray Writer Drive Expansion Bays : External : One (1) 5.25-inch, One (1) 3.5-inch, Internal : Two (2) 3.5-inch Expansion Slots : PCI Express 2.0 (PCIe-x16), PCI Express 1.1 (PCIe-x1) , PCI 2.3 Graphics : Intel GMA X4500HD Audio : Realtek ALC662 Communications : Gigabit Ethernet I/O Ports : Front: Two (2) USB, microphone, headphone, Rear: Four (4) USB, VGA, Serial, HDMI, RJ-45, Stereo line in, Speakers line out, PS/2 Input Devices : Standard Keyboard, Mouse (USB or PS/2) Power : 250W Dimensions : 41.5 x 35.4 x 10 cm Weight : 7.98 kg