Operating System : Windows 7 Home & Pro. MAR, Windows 10 Home & Pro MAR, Ubuntu Linux Chipset : Intel H67 Express Chipset Processors : 2nd & 3rd gen Intel Core i3, Intel Core i5, Intel Core i7 Memory Support : Four DIMM slots expandable up to 16GB 1333 MHz Dual Channel DDR3 SDRAM Hard Drive : 500GB - 3TB 7200RPM SATA Hard Drive or SSD Removable Media : 16X CD/DVD burner (DVD+/-RW), 12x Blu-ray Disc (BD) Combo, 8x Blu-ray Disc (BD) Writer Expansion Bays : 3.5" Bays: 3 bays (1) external; (2) internal, 5.25" Bays: 2 bays Expansion Slots : PCIe x1: 3 Slots, PCIe x 16: 1 Slot Graphics : Intel HD Graphics Audio : N/A Communications : Integrated 10/100/1000 Ethernet I/O Ports : 8 USB 2.0 (4 front, 4 rear), HDMI, VGA, Audio I/O (front/rear) Input Devices : Dell USB Keyboard, Dell 2 Button Scroll USB Mouse Power : 350W, 115/230VAC (Equipped with Selector Switch) 50/60Hz Dimensions : 44.5 x 36 x 17.5 cm Weight : 9.6 kg