No North Pole for me though I keep this room rather chilly for the Computers. I have never ran Prime95 at 4G but I did break this chip in at 3750 on Prime 95 for over 9 hours then called it and my temps where around 60C at 1.60v bios with fans on high and the room around 50F. I agree with your estimation based on a 25C room ending with the mr bluescreen but I keep my Computer room beyond Liebert cool.