Operating System : Windows 10 Home & Pro MAR, Ubuntu Linux, Free DOS Chipset : Intel B250 Chipset Processors : Intel Celeron, Intel Pentium, or 6/7th Generation Intel Core i3 / i5 / i7 Processor Memory Support : Four (4) UDIMM slots , Up to 64 GB DDR4-2400 Hard Drive : HDD or SSD Removable Media : Optional Expansion Bays : N/A Expansion Slots : N/A Graphics : Intel HD Graphics 530 Audio : Realtek ALC662 codec Communications : Gigabit Ethernet I/O Ports : Front Ports : Four USB 3.1 Gen1, optional two USB 3.1 Type-C Gen 2 (only available via special bid), microphone (3.5mm), headphone (3.5mm), Rear : Two USB 3.1 Gen1, two USB 2.0, optional two USB 2.0, serial (9-pin), optional 2nd serial (9-pin), optional parallel (25-pin), ethernet (RJ-45), one VGA, two DisplayPort, two PS/2 ports (keyboard/mouse) Power : 210 W or 180W Dimensions : 92.5mm X 290.5mm X 343.5mm Weight : 6kgrm x 9.25cm, 6kgr