If you are building your own computer, you will have to buy a case to enclose the internal devices. There are numerous computer cases you can choose from, but one of the key factors that will dictate your choice is the size of the motherboard.
Many barebones computer builders buy computer cases with motherboards already attached, so getting the right size is not necessarily an issue. However, those who want to assemble everything from scratch order these components separately, and it is surprising how many people make the elementary mistake of ordering computer cases that are too small for the chosen motherboards.
Another thing to decide when buying a case is what material the case is made from. You can choose between metal casing and plastic casing. If your computer is likely to be in a zone where it is prone to knocks, or to having objects fall on it, then a metal case will provide better durability.
Plastic cases are fine for most scenarios, as people obviously try to protect their computers from hard knocks or falling objects, since they could cause unwanted malfunctions. Plastic cases are also a good deal lighter than metal cases, something to take into account if the computer is likely to be moved around a lot.
You need to have a pretty clear idea of what additional devices you are going to add to the computer in order to choose a case of the right size. If you are planning to add extra hard drives or optical drives, you need to make sure you have room for them. You also need to know how many external ports you need, and think about things like the number of USB connections you will need.
When you know what your computer cases need to be able to accommodate, you can begin shopping around for the right ones.