ECS P55H-AK is ECS most high-end motherboard designed for Intel LGA1156 K series unlock CPU to reach the optimum system performance. It has NVIDIA NF200 with 32 PCIe lanes for 3 x PCIe16X GEN 2.0 graphic interface to support 3-Way NVIDIA SLI / ATi CrossfireX technology. Also, ECS unique M.I.B X interface makes a simple, fast and safe O.C operation in BIOS. With its exclusive Rapid 333 feature, P55H-AK provides USB 3.0, SATA 6Gb/s and eSATA 6Gb/s high data transfer rate to fulfill the most speed-demanding gamers.