Sound cards been removed as my Asus Phoebus doesn't like my Asus Strix with the Asus motherboard (how ironic the 3 cause microphone feedback unlike my last board being a R2E with 2 480's, Asus have made it clear they do not give a toss about this as they never replied to anyones plea for help on the official asus forums)
USB wise I disconnected my Dell monitor USB as it caused an event viewer error so all I have is a Logitech G710+ and Razer Mamba 2012 that are both plugged into the USB2 ports. Nothing else is connected and this restart was out of the blue with the previous 30+ power up's working fine!