You know whats strange. My Noctua fan is on 24/7 as long as the unit is plugged in even off. its strange I replaced it with the stock fan and the stock fan is the same. I checked the board and its fine. I have been playing with the kernel settings via performance control and its rooted but all is good. the hottest I have been able to get it streaming 1080P from my mac to it via ethernet is 138F which is ~ 58C so I am happy until my 3D printer comes and I can make a proper case.