Homebuilt computer

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A custom built or home-built computer is a computer assembled by its user and made of commercial off-the-shelf (COTS) components, rather than purchased as a complete and ready to use machine, also known as a "pre-built" or out-of-the-box system.

Building a computer at home is generally considered a cost-effective alternative to buying a pre-built one because it excludes the assembly labor cost. However, the total cost of building a computer can vary based on an individual's budget, the quality and availability of the parts used, and the discounts offered by mass production. As a result, the final cost may potentially exceed that of typical pre-built computers.^[1]

Home-built computers are often used at home, like home computers, but home computers are traditionally purchased already assembled by the manufacturer. Some suppliers provide both home and homebuilt computers, like the Newbear 77-68, which the owner was expected to assemble and use in their home.