Operating System: Windows 10 Home & Pro MAR, Ubuntu Linux, Free DOS Chipset: Intel B250 Processors: Intel Core i3, i5, i7 6th & 7th Gen, Intel Pentium, Intel Celeron Memory Support: Two (2) DIMM slots, Up to 32 GB DDR4 SDRAM 2400 Hard Drive: SATA HDD or SSD M2 NVMe Removable Media: N/A Expansion Bays: One (1) 3.5 inch, 1" high, internal, supports 2.5" or 3.5" HDD/SSD Expansion Slots: One (1) PCI Express 3.0 x 16, One (1) PCI Express 3.0 x 1 Graphics: Intel HD Graphics Audio: High Definition Audio Communications: Realtek RTL8111HN I/O Ports: Front- Two USB 3.0, microphone, headphone, Rear ports : Two USB 3.0, two USB 2.0, serial, ethernet, one VGA, one DisplayPort, two PS/2 ports Power : 180 w Dimensions : 100mm X 303.5mm X 273.5mm Weight : approx 4.25 kg