A PC power supply is an important component of every computer system. It converts the alternating current from the mains supply into the direct current required by the PC. Owners can often use a power supply for more than one computer, so buying a good quality model is a wise decision. When deciding which product to purchase, such as a 750W PC power supply, buyers should consider how much power they require, in addition to the efficiency and design of the unit.
PC Power Supply Size
Most PCs use an ATX power supply, and buyers should check the specification for their computer before selecting a model. ATX standards determine the height and width of the power supply, but the depth of the units varies. Most are about 14 centimetres deep, and models for higher wattage supplies can be 2.5 centimetres larger. The power supply must fit the computer, while allowing room for cables, and not conflicting with fans and other components. Most power supplies have one or two cooling fans built into the unit. Large computer cooling fans are typically quieter.
PC Power Supply Wattage
Users that build computers for gaming or graphic design often choose high-end sound and graphics cards. These components require more power than many other computer parts. Before buying a power supply, calculate the total wattage required by the individual parts of the computer, including the processor.
PC Power Supply Cables
Power supplies must have the right connectors for the computer. Buyers should compare the connectors on the computer parts to those on the power supply to make sure that they are compatible. Some power supplies have fixed cables hardwired into the unit. In this case, the buyer must match the computer's layout exactly. Other power supplies come with modular cables so buyers have several options when it comes to choosing the type of cables used for the unit.