Computer cases, are the envelope that holds all of the computer parts. We can call it the housing of all of the parts that 
The computer basic parts are:
* Motherboard
* CPU
* Memory
* Hard-Disk drives
* Graphic Card
* Sound card
* Network Card (internet/network connections)
* Power Supply (Electricity)
* CD/DVD Drive
* Cooling devices – Fans, CPU coolers etc… (to keep the computer from heating).
These are the basics that when combined together creates a computer. Now since we need to hold all of those parts within something, the box that holds them in is called a “Computer Case“. Now you can say that you don’t mind what type of a computer case it will be, just get me any of them (cheap one) that will hold all of my computer parts in, and let me work.
Now basically you will be right and a basic computer case will be fine. But depending on the purpose of your computer and some people use heavy application on their computer, the choice of which computer case you are using, might affect the amount of heat your computer parts reaches. We all know that the materials the computer parts are built from, might be effected by heat, if it will be too hot, the metal or parts might get damaged or change their original form, distort or curve in such a way that will get the part useless.
Computer case might be chosen due to its cooling abilities, or due to it’s amazing design, flashing blue lights etc… Some might just enjoy those. Also, you might want a computer case that you can add more hardware into it, so it has to have more space for more hard-disks, more DVD drives etc…
So anyway, lets talk about our options, what can we find out there? which brands ? what to look for and how to choose our next computer case. Just to remind you that you can buy a computer with the case the seller offers as a package, or select your parts including the computer case, to fit your desires. You can also decide your old computer needs an upgraded computer case, since it gets too hot.
Selecting a computer – by design
I can’t say I really made an effort to find a crazy designed computer case, but I have collected some info for you just to let you know how many computer design options are out there, and there are of course many more.
* There are crazy computer case designs out there, here are some links so you can get some idea of how wild you can go with the Computer Cases designs
1. http://www.envador.com/
2. http://www.mashie.org/
3. http://sixrevisions.com/design-showcase-inspiration/30-beautiful-custom-pc-case-designs/
Selecting a computer – by Performance
I can say that as a “Gamer” I like the computer cases by “Antec”, they are very quiet (no machine noise – and if you will keep the fans clean, you will not hear the computer works). I like the computer case to be solid and simple, but large in size, and very cooled without going too crazy (since the sky is the limit). But there are many other good companies who design computer cases, which you might like.
Those who are famous in good cooling systems, are “ZALMAN“, “ANTEC“, ” THERMALTAKE“, “COOLER MASTER” and there are probably more, but those are the most famous ones. So, just think of the purpose for your computer, how much you are willing to invest in the computer case, and just go through those companies, and the computer chassis they are offering, and you will be on your way to a better and cooler computer, that will preserve more since “COLD” is good for electric parts/devices.