Xbox One’s architecture allows it to detect when it is about to overheat and self-regulate its power to cool itself down and prevent unexpected shutdowns, according to Xbox’s general manager of console development Leo del Castillo.
“One thing that we have more flexibility with the architecture of the Xbox One, is that we can dial back the power of the box considerably,” del Castillo told Gizmodo. “We had a little less flexibility with the 360. And so basically, if we couldn’t dissipate the heat, there wasn’t a whole lot of leverage we could pull to keep the heat from being generated, so we had a limited amount of time before it just shut down. Xbox One can actually dial it back to a lower power state, so low in fact that it can in a mode that uses virtually no air flow.”
The Xbox One is designed so that the fan won’t reach max speed “under normal environmental conditions.” This allows the console an overhead to cool itself down, solving “the condition without the user having to do anything.”