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Computer Accessory
Computer Cases: The Basics
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A computer case (also known as the computer chassis, box or housing) is the enclosure that contains the main components of a computer. Cases are usually contructed from steel, aluminum or plastic although other materials (such as wood and perspex) have also been used in case designs.
Size and Shape of Computer Cases
Cases can come in many different sizes or "form factors". The most common form factor is ATX, although small form factor cases are becoming popular for a variety of different uses.
Cases are often said to come in "towers" (such as mini tower, mid-sized tower and full-sized tower)", "desktops", "pizza boxes" (also called flatbed or (horizontal) and "slim desktops" that uses the LCD like housing. Tower cases are taller and typically have more room while desktop cases are more compact and are more popular in business environments.
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Small form factor cases are a variety of cases that are coming more and more common. Companies like Shuttle computers and AOpen have been producing such cases and Mini-ITX is the most common motherboard designed for these cases. Apple Computer recently announced its Mac Mini computer, which is around the size of a CD-ROM drive.
Computer Case Functions
Cases usually come with room for a power supply unit, several expansion slots and expansion bays, wires for powering up a computer and some with built in I/O ports that must be connected to a motherboard.
Motherboards are screwed to the bottom of the case, its I/O ports being exposed on the side of the case. Usually the power supply unit is at the top of the case attathed with several screws. The typical case has four 5.25" and three 3.5" expansion bays for devices such as hard drives, floppy disk drives and CD-ROMS. A power button (and sometimes a reset button that can be turned-on and off using a remote control) are usually located on the front to turn the computer. LED status lights for power, hard drive activities are often located near the power button which are powered from wires that connect up to the motherboard. Some cases come with status monitoring equipment such as case temperature or processor speed monitor which appear on an LCD on the side.
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