It protects the inner components of the system, keeps them cool and prevents them from causing radio frequency interference (RFI). These are important functions that are oftentimes overlooked.
Construction of the computer case is usually steel (SECC - Steel Electrically Chromate Coated) Aluminum and Plastic.
Steel makes the unit more rigid whilst aluminum is a good dissipator of heat.
Other materials are sometimes used in fabricating your home-built cheap computer case.
Here are the basic components of the system case:
The present computer case designs provide maximum cooling using either air or liquid. One new feature is the location of the power supply unit at the lower rear end.
Intake vents and fans are strategically placed to provide maximum air circulation.
The flow of air in and out of the system should not be restricted. (See diagram below):
There are two basic designs of computer cases - The Desktop Case and the Tower Case. (See picture below):
Within these two basic designs are different sizes known as form factors. The size and shape of the computer case are usually determined by the form factor of the motherboard. Form factor is a measurement of the internal dimensions of the case.
The popular form factors are ATX, microATX and small form factor (SFF).
Among the form factors are the desktop and tower cases.
Radio Frequency Interference (RFI)
While the computer is turned on, the internal components generate stray electromagnetic radiation. This radiation is emitted at various frequencies including the ones used by radio stations. This is called radio frequency interference (RFI).
This radiation can interfere with radios and other electronic devices; therefore, it was regulated by the Federal Communication Commission (FCC).
A manufacturer must show that a computer produces an acceptable level of RFI before it can be sold. This radiation can be controlled in many ways; the most obvious being the construction of the cheap computer case.
A well-designed metal computer case controls most of this radiation and enables the manufacturer to obtain certification for the computer system. There are two levels of certification:
RFI can radiate from a computer that has a poorly designed case or from one that has opened slots - slot covers not replaced. Always replace slot covers.
Maintaining your Cheap Computer Case
Hardly anything goes wrong with the case. If it's kept clean and not abused, it will outlast every other component! If you bounce it or drop it, the delicate components inside will be damaged - so treat it gently.
Ways to prevent damage to Computer
Finally, if adapter cards are removed, ensure that the slot covers are replaced since open slots can affect air circulation through the computer causing components to overheat.
ConclusionAt first glance, the computer case doesn't seem to perform any function. But, its role is indeed an extremely important one!
Click here to read 'Guide to Selecting a Cheap Computer Case'.
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