ASRock ATX DDR4 LGA 1151 Motherboard Z170 PRO4S Socket: LGA1151 Chipset: Intel Z170 Memory: 4x DDR4-3200+(OC)/ 2933(OC)/ 2800(OC)/ 2400(OC)/ 2133 DIMM Slots, Dual Channel, Non-ECC, Unbuffered, Max Capacity of 64GB Slots: 2x PCI-Express 3.0x16 Slots (one runs at x4), 3x PCI-Express 3.0x1Slot (Flexible PCIe) Multi-Graphics: Support AMD Quad CrossFireX,CrossFireXTechnology Ports: 8x USB 3.0Ports (6 rear, 2via header), 4x USB 2.0Ports (via headers), 1x PS/2 Mouse/Keyboard Port,1xHDMI Port,1x DVI-D Port,1x RJ45 LAN Ports, Audio I/O Jacks Form Factor: ATX