The ASRock X99 Extreme4 is a mid-range motherboard for the new Intel high-end "Haswell-E" processors, based on the new LGA2011-v3 socket. It includes three PCI Express 3.0 x16 slots, ten SATA-600 ports, six USB 3.0 ports, and a high-end audio codec. Let's take a good look at this board.