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How to Choose Your Computer Power Supply

The computer power supply is vital to the operation of any computer, yet it is an often overlooked component. Without a power supply, your computer would just be a box full of plastic and metal.

What the Computer Power Supply Does
In a PC, the computer power supply is the metal box usually located in the corner of the computer case. In many systems the power supply is visible from the back of the case because it contains the power-cord receptacle and the cooling fan.

The main purpose of the power supply is to convert AC power from the mains to usable low-voltage DC power for the internal components of the computer.

The power supply gives out three different DC voltages to your computer, 12VDC, 5VCD, and 3VDC. These three voltages are used for different components in your system. For example, the 5VDC voltage powers the motherboard, voltage regulators, serial and parallel ports, and PCI and AGP ports.

How Much Power Do You Need?
Each power supply has a certain wattage based on their maximum output power. Common wattages range from 300W to 500W, although for a high-end gaming power supply wattages of 500W to 800W are common. Some units even go up to 1 kW of wattage, but this amount of power isn’t neccessary for normal users.

For a typical gaming computer I would recommend at least 500W of power, although you may need more or less depending on your system. It would be wise to research into exactly how much power your various components will require, and then get a power supply with at least that amount of power.

Conclusion
The computer power supply is a vital part of your computer. It provides the power to the components in your system, and also cools your computer with a fan. Make sure you don’t skimp on buying a decent power supply, otherwise your whole system will suffer.

When choosing your power suppy, keep in mind the amount of wattage you will need. A typical gaming computer will require an average of at least 500W power

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