The reason power consumption scales with temps is that the hotter a conductor get the more resistance there is which in turn breeds more heat. Higher voltages are required then to keep them working with increase temps/resistances further. It's an up hill battle. My 480 stays under 45C at all times so consumption goes down, but then again i have to run a pump and radiator fans. Can't beat physics nothing is free. :P
Super-conducting states are excluded.