Operating System : Windows 10 Home & Pro MAR, Ubuntu Linux, Free DOS Chipset : Intel G41 Processors : Intel Core 2 Quad, Core 2 Duo, Pentium Dual Core, Celeron Dual Core, Celeron Memory Support : Two (2) DIMM slots , Up to 8 GB DDR3 1066 MHz Hard Drive : Sata 3Gb/s 7.200 rpm up to 500 GB Removable Media : DVD-ROM/ DVD-ReWritable 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 : Intel Graphics Media Accelerator X4500 Audio : Integrated Audio Codec Communications : Broadcom Integrated Gigabit Networking (BRCM 57780) I/O Ports : Front: Two (2) USB 2.0, Audio I/O, Rear: Six (6) USB 2.0, VGA, RJ-45, Serial, Parallel, Audio I/O Input Devices : Standard Keyboard, Mouse (USB) Power : 235W Dimensions : 35.3 x 39.9 x 11.4 cm Weight : 9 kg