Operating System : Windows 10 Home & Pro MAR, Ubuntu Linux, Free DOS Chipset : Intel iQ33 Processors : Intel Core 2 Duo, Dual Core, Pentium & Celeron Memory Support : Four (4) DIMM slots , Up to 8 GB DDR2 SDRAM  Hard Drive : Up to 250 GB 7200 rpm Removable Media : DVD-ROM/ DVD-ReWritable Expansion Bays : External: One (1) 5.25-inch, One (1) 3.5-inch, Internal: One (1) 3.5-inch Expansion Slots : One (1) LP PCI-e 2.0 x16, One (1) LP PCI-e 2.0 x1, Two (2) LP PCI Graphics : Intel GMA 3100 Audio : Realtek ALC 262 Communications : Broadcom BCM5754 I/O Ports : Front: Two (2) USB 2.0, Audio I/O  Rear: Six (6) USB 2.0, Audio I/O, VGA, Two (2) PS/2 Input Devices : Standard Keyboard (PS/2 or USB) Power : 270 W Dimensions : 38 cm x 34 cm x 10 cm Weight : 10 kg