Operating System: Windows 10 Home & Pro MAR, Ubuntu Linux, Free DOS Chipset: Intel Q87 Express Processors: Intel Core i5, i7 Quad Core, Intel Core i3 Dual Core Memory Support: Four (4) DIMM slots , Up to 16 GB DDR3 SDRAM  Hard Drive: SATA III up to 1TB or SSD Removable Media: Slim-line DVD-ROM/DVD-ReWritable Expansion Bays: External:One (1) 12.7mm for ODD Internal: One (1) 3.5-inch Expansion Slots: One (1) PCIe x16, One (1) PCIe x1 6(wired as x4)Slot(s) Graphics: Intel HD Graphics Audio: Realtek ALC3220 High Definition Audio Codec Communications: Intel I217LM Gigabit Network Connection I/O Ports: Front: Two (2) USB 3.0, Two (2) USB 2.0 Audio I/O, Rear: Two (2) USB 3.0, Four (4) USB 2.0, VGA, Two (2) DP, RJ-45, Serial, Two (2) PS/2, Audio I/O Input Devices: Standard Keyboard,Mouse (USB or PS/2) Power: 255W Dimensions: 31.2 x 29 x 9.26 cm Weight: 5.3 kg