Operating System: Windows 10 Home & Pro MAR, Ubuntu Linux, Free DOS Chipset: Intel H110 Processors: Intel Core i3, i5, i7 6th Gen, Intel Pentium, Intel Celeron Memory Support: Two (2) DIMM slots, Up to 32 GB DDR4 SDRAM 2133 Hard Drive: SATA HDD or SSD Removable Media: N/A Expansion Bays: One (1) 5.25 inch, Two (2) 3.5 inch Expansion Slots: One (1) PCI Express 3.0 x 16, Two (2) PCI Express 2.0 x 1 Graphics: Intel HD Graphics Audio: High Definition Audio Communications: Realtek RTL8111GN 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 or 250 w Dimensions : 160mm x 394.5mm x 398mm Weight : 9 kg