It is possible to build a custom computer for specific needs. First of all, every computer’s component can be selected to suit the specific needs. For example, if the desktop computer is going to be used for playing computer games, then it is probably worth buying the latest and an expensive video card with memory amount as big as possible.
Custom computer can even be assembled at home. The process of assembling is very simple.
It requires buying necessary parts and then assembling everything in the computer case. Nowadays, computer cases are of few types. There also are barebone cases, this type of case is very small and one of the companies that produce it is Shuttle.

For designers there is a choice of bigger and better monitors. Also there are manufacturers making special monitors for media and design works.

There is a wide variety of custom built computers at the local computer shops and online computer retailers.  If the assembling of the custom built computer is left to be done by the seller the assembled unit will be sent home. Everything has to be plugged into right places so that computer could be started to be used.

There also can be partially custom built computers. In such cases, the latest expensive video card to make the computer suitable for video games is usually installed.
Or it can be installed to the computer by the computer retailer.

Custom desktop computers can be bought online.
In the UK there are online retailers, such as Microdirect, where custom desktop computers can be built from components.

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