ASRock Micro ATX DDR3 1066 LGA 1150 Motherboard Z97M OC FORMULA LGA1150 Chipset: Intel Z97 Memory: 4x DDR3-3300+(OC)/ 2933(OC)/ 2800(OC)/ 2400(OC)/ 2133(OC)/ 1866(OC)/ 1600/ 1333/ 1066 DIMM Slots, Dual Channel, Non-ECC, Unbuffered, Max Capacity of 32GB Slots: 2x PCI-Express 3.0 x16 Slots (run at x16 or x8/x8), 1x PCI-Express 2.0 x16 Slot (runs at x4), 1x PCI-Express 2.0 x1 Slot Multi-Graphics: Supports AMD Quad CrossFireX, CrossFireX and NVIDIA Quad SLI, SLI Technology Ports: 6x USB 3.0 Ports (4 rear, 2 via header), 8x USB 2.0 Ports (4 rear, 4 via headers), 1x PS/2 Mouse/Keyboard Combo Port, 1x VGA Port, 1x DVI-D Port, 1x HDMI Port, 1x Optical S/PDIF Out, 1x eSATA Port, 1x RJ45 LAN Port, Audio I/O Jacks