Computers use a lot of energy, meaning they can get really hot. To avoid your computer becoming damaged from overheating, make sure to get a quality cooling system in your machine. A typical cooling system consists of a heatsink and a fan; the heatsink draws heat away from sensitive electronics and into a radiator, which a fan blows cool air over in order to decrease the temperature. For more powerful builds, you may want to consider water cooling, which will be more expensive but overall more efficient.