Custom Built Windows 8.1 Intel 4th Generation i5i7 Quad Core Mini Tower Computer with 3 Display outputCPU: LGA1150Supports 4th Generation Intel Core i7 i5 i3, Pentium, Celeron ProcessorsChipset: Intel Q87 ExpressMemory: 4x DDR3-16001333 DIMM Slots, Dual Channel, Non-ECC, Max Capacity of 32GBSlots: 1x PCI-Express 3.0 x16 Slot, 1x PCI-Express 2.0 x16 Slot (runs at x4), 1x PCI-Express 2.0 x1 Slot, 1x PCI SlotMulti-Graphics: Supports AMD CrossFireX TechnologySATA: 6x SATA3 Ports, Support RAID 0, 1, 5, 10Audio: Realtek ALC887 7.1-Channel High Definition Audio CODECLAN: Intel Gigabit Ethernet ControllerPorts: 4x USB 3.02.0 Ports (2 rear, 2 via header), 8x USB 2.01.1 Ports (4 rear, 4 via headers), 1x PS2 Keyboard Port, 1x PS2 Mouse Port, 1x Optical SPDIF Out, 1x RJ45 LAN Port, Audio IO JacksVideo: 1x VGA Port, 1x DVI-D Port, 1x HDMI Port, 1x DisplayPort (3 usable at one time)