Just built a new rig about a week ago. Unfortunately at first power up I got a spark and a popping noise. Immediately shut down the PC and checked all the connections and only thing I could see that may have caused it were the unused plugs on the PSU being too close to the PSU. I moved them further away from the PSU and wire tied them down and started up again. PC started up fine and was able to load the OS and all the other goodies. The one thing that sounded different was at start up there was a ticking noise coming from the PC that sounds like it comes from the PSU and this noise does go away as it warms up. PC seems to be running perfectly but would like opinions as to what this may be.