MSI VESA-Mountable Desktop Barebone ProBox23-006BUS, Black CPU Socket LGA 1150 for Intel 4th-generation Pentium/Core i3/Core i5/Core i7 processors (Max. TDP: 65W) Intel H81 chipset VESA-mountable 2 DDR3 SO-DIMM slots (Max. 16GB, 1333/1600 MHz) 2.5" SATA 6Gb/s HDD Drive Bay x2 No ODD Drive Bay Front USB2.0 x4, Rear USB2.0 x2, Rear USB3.0 x2, Gigabit LAN x1, HDMI-out x1, DVI-out x1, eSATA x1, Front Mic-in x1, Front Headphone-out x1, Rear Audio Jack x3 2.3 Liters