Built a new I75930k system a few weeks ago. Overclocked to 4.4ghz stable. I connected a bunch of usb devices for a flightsim setup to the two connectors in the front and back. After this the system hung at the bios selection page. Disconnected one of the front usb connections and the system booted normal. Went into the bios and disabled all usb 3 options. Now I can attach everything without anymore boot problems. Anyone else here had that problem?