Here it is
Cooling the most important components of the computer.
All the parts of the computer get really hot they can melt withouth fans.
Lets get to cooling theres two types of cooling air cooling and water cooling.
Air cooling is just using fans running of the power supply to keep it cooled down for a single component.
This method is more easy to set up and is cheaper but then it still needs more fans for this method of cooling.
Water cooling is more diffrent then air cooling it requires a pump,radiator,reservoir for lower temps.
For water cooling its not limited for one component it can be setup for all components like CPU, GPU, and Motherboard too.
But if a single pipe is not tighten enough or has a little leak it will break any component in contact for good.
The pump,radiator,reservoir is harder to maintain.
Water coolings low noise level is one of the good things about its cooling but can become quite noisy.
Fans are cheap to get most prebuilt computers use 80mm fans that don't preduce enough cool air to cool the whole computer down.
If you want full detail check these out
http://en.wikipedia.org/wiki/Computer_cooling#Water_coolinghttp://computer.howstuffworks.com/liquid-cooled-pc.htmIf you don't understand a single word then I give up. This is a bit rushed .
this is not my best work >:c