YouTube user Oyinko, as well as a bunch of other folks over at the official Apple support forums, did mention that the fan in the 2013 Retina MacBook Pro model will actually increase its speed to a potentially dangerous level, never mind that the MacBook Pro itself is not doing anything processor intensive, and hence, logically would not need that kind of cool air. According to Oyinko, the possible reason why the fan has gone all wonky would be the change of a Samsung SSD to that of a Sandisk SSD, where the new (and obviously foreign) Sandisk ends up creating a conflict in fan management. Short of an update from Apple to fix this issue, there does not seem to be any other method. Are you affected as well?