In order to do a major project whether it is renovating a house, doing some custom bodywork on your car or modifying your computer, you need to have an idea what it is your want the finished product to look or work like. This is not a trivial step. You need to look at your project from multiple angles and take into account a lot of factors. Designing a custom cooling system for your computer is just one of these tasks that require careful consideration before you pick up a screwdriver or acquire parts.