Today we tested a brand new X99 motherboard with USB 3.1 support here on OCinside.de. This time we have tested and overclocked the ASRock X99X killer 3.1 LGA 2011-3 motherboard with an Intel Core-i7 5930K CPU and four Crucial Ballistix Sports DDR4-2400 memory modules. This motherboard contains, in addition to the built-in USB 3.1 Type-C port an ASRock USB 3.1 Card/A+A for the PCIe slot with two additional USB 3.1 Type-A 10 Gb/s ports as special feature. The ASRock Fatal1ty X99X Killer 3.1 has also eight DDR4 slots, an Ultra M.2 slot up to 32 Gb/s, a mini-PCIe slot, ten SATA3 connectors, eSATA3, the HDD saver function, Purity Sound 2 with analog and digital sound output, five PCIe slots, two Gigabit LAN ports, and much more.