Operating System : Windows 10 Home & Pro MAR, Ubuntu Linux, Free DOS Chipset : Intel Q270 Processors : Intel Celeron, Intel Pentium, Intel Core i3, i5, i7 6th & 7th Gen Memory Support : Four (4) DIMM slots , Up to 64 GB DDR4 - 2400 Hard Drive : M.2, Sata III or SSD Removable Media : Optional Expansion Bays : One (1) slim ODD, One (1) 2.5" HDD, Two (2) 3.5" HDD, One (1) 5.25" Expansion Slots : Two (2) FH PCIe x1, Two (2) FH PCIe x16, one wired as x4, One (1) M.2 2230 for optional wireless NIC, One (1) M.2 2280 for storage drives Graphics : Intel HD Graphics Audio : Conexant CX20632 Audio Codec Communications : Intel  I219LM Gigabit Ethernet Port I/O Ports : Front: One (1) audio out, Two (2) USB 2.0, One (1) USB Type-C, Two (2) USB 3.1 Rear: : One (1) RJ-45, Two (2) USB 2.0, Four (4) USB 3.1, One (1) choice of DisplayPort, HDMI, VGA or USB Type-C Power : 250 W standard efficiency; 500 W standard efficiency Dimensions : 15.4 x 36.9 x 36.5 cm Weight : 9.86 kg