ASRock ATX DDR3 1066 LGA 1150 Motherboards Z97 EXTREME6/AC LGA1150 Chipset: Intel Z97 Memory: 4x DDR3-3000+(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 x2), 2x PCI-Express 2.0 x1 Slots, 1x Mini PCI-Express Slot SATA: 10x SATA3 Ports, Six Support RAID 0, 1, 5, 10; 1x SATA Express Port Ports: 10x USB 3.0 Ports (6 rear,4 via headers), 5x USB 2.0 Ports (4 via headers, 1 Type A), 1x PS/2 Mouse/Keyboard Combo Port, 1x DVI-I Port, 1x HDMI Port, 1x Display Port, 1x Optical S/PDIF Out,1x eSATA Port, 2x RJ45 LAN Ports, Audio I/O Jacks Power Connector: 1x 24pin ATX Power Connector, 1x 8pin 12V Power Connector, 1x PCI-Express Power Connector Multi-Graphics: Supports AMD Quad CrossFireX, CrossFireX and NVIDIA Quad SLI, SLI Technology