Heat is actually a--the process of heat transfer conduction, convection, radiation in several ways. Usually are mainly wind-cooling technology in the desktop, this includes the CPU, graphics card, power supply and chassis cooling fan, laptop, main cooling air is as usual, most of the cooling system are: + fan + heat pipe heat sink combinations. Many notebook computers made of aluminium-magnesium alloy case, the heat also played a role. As we all know, laptops usually have thermal vents at the bottom, or suction or blowing out, laptop cooling is very important. Notebook computer in design also takes into account problems, tends to fuselage with a stepping up, but when the temperature is too high, it grudgingly.