Desktop power supplies provide electricity to computer components, converting AC to DC. They can burn out and need replacement with a compatible component. Power supplies range from 500-1400 watts and vary in size. Laptops have external converters and smaller internal power supplies. Replacement is simple and can be done by a technician.
A desktop power supply is a computing device designed to supply electricity to the various components of a computer. Power supplies can be integrated into a computer system and can also be mounted externally, depending on the type of computer system and design. Over time, a desktop power supply can burn out and may need to be replaced. It is important to use a compatible component for replacement to avoid computer problems developing.
Alternating current (AC) straight from the wall is not usable for computers. A desktop power supply converts alternating current to direct current (DC) for use by the computer. Power supplies are rated by how much electricity they can process, with standard models ranging from 500 watts to 1400 watts. The size of a power supply depends on the system. A small basic computer has low power requirements, while something like a server will draw a lot of power and need a large power supply.
The desktop power supply most commonly takes the form of a large box, with vents and fans to allow heat to escape. One connector connects the power supply to the wall, and a series of cables are designed to lead to the motherboard. The desktop power supply design typically includes a number of pins designed to connect to the motherboard. Common variants are 20-pin and 24-pin power supplies.
The basic principles seen in a desktop power supply are also present in the power supplies used for laptops. Laptops typically have an external converter to handle power directly from the wall, and a smaller power supply can also be installed inside the laptop. Laptop power requirements vary, and one challenge with laptops is designing power supplies that are small enough and powerful enough to run a laptop successfully. It is very common for laptops with high power requirements to heat up during use, an issue that must be addressed in the design to avoid causing damage or injury.
Replacing a desktop power supply is relatively simple. The computer must be turned off and unplugged so that the case can be opened to allow the user to unscrew the power supply. Replacement power supplies can be ordered from computer component companies or directly from the computer manufacturer, and the new power supply simply fits into the computer and plugs it in. People who aren’t comfortable opening their computer case can pay a technician to replace the power supply; generally the cost to replace is low as the task does not take much time.
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