Computer Case Form Factors
A computer case, also known as cabinet, tower, system unit, or simply case, is a plastic or metal box that contains various internal components of the computer such as motherboard, CPU, memory, disk drives, and PSU. The size and shape of the computer case is an important consideration if you’re assembling a PC. Firstly, it determines the type and number of components that will fit inside the computer. Secondly, it affects the cooling within the case. A bigger case can accommodate larger cooler, multiple fans, and taller heat sinks, resulting in better and effective cooling.
Computer cases come in four distinct sizes or form factors: small form factor (SFF), mini tower, mid tower, and full tower. A tower is designed to be placed vertically on a surface.
Small Form factor (SFF):- It usually comes in different shapes, from cubes to desktop to normal towers, and supports mini ITX motherboard with minimal drive-mounting options and sometimes supports add-in graphics cards. This is designed to be semi-portable and space-saving.
Mini tower:- It is usually used for general-purpose PCs where requirement for additional devices is limited. Most mini towers are only suitable for use with a single graphics card with adequate cooling. It supports a microATX motherboard.
Mid tower:-  It is the most common PC case for custom builds and stands 17-21 inches tall and supports a full sized ATX motherboard. A typical mid tower can comfortably accommodate six to eight drive mounts, to graphics cards, and adequate cooling in space.
Full tower: It is usually used for high-end computers such as PC servers and dedicated gaming PCs that need extra space for additional hardware components. Full tower provides more drive expansion, better cooling than the mid tower. It can range from 22-27 inches and supports full sized ATX as well as EATX motherboard.

Next topic Input/ Output (I/O) Devices.

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