Operating System : Windows 10 Home & Pro MAR, Ubuntu Linux, Free DOS Chipset : Intel H61 Express Processors : Intel 2nd Generation Core i3, Intel Pentium, Intel Celeron Memory Support : Up to 8 GB DDR3 1600 MHz SDRAM, 2 DIMM Slots Hard Drive : HDD Removable Media : N/A Expansion Bays : External: One (1) 5.25-inch, Internal: One (1) 3.5-inch Expansion Slots : One (1) PCI Express x16, Three (3) PCI Express x1, One (1) Mini PCI Graphics : Integrated graphics (Intel HD, Intel HD 2000, Intel HD 3000, Intel HD 4000) based on processor Audio : Realtek ALC656 Communications : Integrated Realtek RTL8171E Gigabit Ethernet Controller I/O Ports : Front: (2) USB 2.0 ports, dedicated headphone port, microphone jack, Rear: Four (4) USB 2.0 ports, RJ-45 Ethernet Port, DVI-D and VGA video ports, audio in/out jacks (5.1 channel audio out) Power : 300 W Dimensions : 16.5 x 38.9 x 36.8 cm Weight : 6.932 kg to 7.18 kg (approximate)