Case modification, commonly referred to as case modding, is the modification of a computer case or a video game console chassis. Modifying a computer case in any non-standard way is considered a case mod. Modding is done, particularly by hardware enthusiasts, to show off a computer's apparent power by showing off the internal hardware, and also to make it look aesthetically pleasing to the owner.
Cases may also be modified to improve a computer's performance; this is usually associated with cooling and involves changes to components as well as the case.
When personal computers first became available to the public, the majority were produced in simple, beige-colored cases. This design is sometimes referred to be as a beige box. Although this met the purpose of containing the components of the personal computer, many users considered their computers as "tacky" or "dull", and some began modifying their existing chassis, or building their own from scratch. One of the original case mods is the "Macquarium", which consists of replacing the CRT screen in a Compact Macintosh case with a fishbowl.
A new market for third-party computer cases and accessories began to develop, and today cases are available in a wide variety of colors and styles. Today the business of "modding" computers and their cases is a hugely profitable endeavor, and modding competitions are everywhere. Since 2017, Computer hardware companies have started to offer some of their products with built-in RGB LED lighting, replacing earlier Non-RGB LED (single color LED) lighting. Non-RGB LED lighting started to replace earlier CCFL-based (mixed with single color LEDs) lighting, starting in the late 2000s and early 2010s. RGB lighting may be integrated onto fans, Liquid cooler pumps, RAM modules, or graphic card coolers, or they may be installed in the case itself as an RGB light strip. RGB lights may be controlled by the motherboard with an onboard lighting controller, or externally with a separate controller. They may also draw power directly from the power supply.
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A computer case, also known as a computer chassis, is the enclosure that contains most of the hardware of a personal computer. The components housed inside the case (such as the CPU, motherboard, memory, mass storage devices, power supply unit and various expansion cards) are referred as the internal hardware, while hardware outside the case (typically cable-linked or plug-and-play devices such as the display, speakers, keyboard, mouse and USB flash drives) are known as peripherals.
In personal computing, a tower is a form factor of desktop computer case whose height is much greater than its width, thus having the appearance of an upstanding tower block, as opposed to a traditional "pizza box" computer case whose width is greater than its height and appears lying flat. Compared to a pizza box case, the tower tends to be larger and offers more potential for internal volume for the same desk area occupied, and therefore allows more hardware installation and theoretically better airflow for cooling.
Computer hardware includes the physical parts of a computer, such as the case, central processing unit (CPU), random access memory (RAM), monitor, mouse, keyboard, computer data storage, graphics card, sound card, speakers and motherboard. By contrast, software is the set of instructions that can be stored and run by hardware. Hardware is so-termed because it is "hard" or rigid with respect to changes, whereas software is "soft" because it is easy to change. Hardware is typically directed by the software to execute any command or instruction.
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