Chances are it has a fan to keep its circuits from overheating. Air inside the computer, heated by the warm electronics, expands, becoming less dense than the cooler air outside. The denser, cooler air flows in to replace the warm, which ends up bubbling out the top, not unlike the behavior of bubbles in boiling water. As a result, heat is transported away from the computer's interior, keeping it cool. The base of each fin conducts heat away from the attached chip and carries it first to the relatively larger surface area of the fin and then into the adjacent air.
Conduction is responsible for an iron frying pan's handle getting too hot to touch.
A good conductor, such as iron and many other metals, transports heat from one molecule to the next. An example would be a thick glove, or a blanket. You can't just run a fan, because there's no air for the fan to blow. And without air or some other fluid, you can't depend on convection to keep things cool. In this installment, we'll take a look at the thermal control system found in US interplanetary spacecraft.