Operating System : Windows 10 Home & Pro MAR, Ubuntu Linux, Free DOS Chipset : Intel® B65 Processors : Intel 2nd Generation Core i3,i5,i7, Intel Pentium, Intel Celeron Memory Support : Four (4) DIMM slots , Up to 32 GB DDR3 SDRAM , 1333MHz Hard Drive : Up to SATA HDD 2TB 7200 rpm or SSD Removable Media : DVD-ROM/ DVD-ReWritable Expansion Bays : External: One (1) 3.5-inch, One (1) 5.24-inch, Internal: One (1) 3.5-inch Expansion Slots : One (1) LP PCI Express x16, One (1) LP PCI Express x1, One (1) LP PCI Graphics : Intel HD Graphics on all models (integrated on processor) Audio : High Definition Audio Communications : 10/100/1000 MBit/s Realtek RTL 8111E I/O Ports : Ten (10) USB 2.0 (6 rear, 2 front, 2 internal), VGA, DVI-D, Serial, 2 x PS/2, RJ-45, Audio I/O Input Devices : Standard Keyboard, Mouse (USB or PS/2) Power : 280 W Dimensions : 340 x 382 x 98 mm Weight : approx. 10 kg