PSU The AGP Power Supply

General Description - The complete range of power supplies is very broad, and could be considered to include all forms of energy conversion from one form into another. Conventionally though, the term is usually confined to electrical or mechanical energy supplies. Constraints that commonly affect power supplies are the amount of power they can supply, how long they can supply it for without needing some kind of refueling or recharging, how stable their output voltage or current is under varying load conditions, and whether they provide continuous power or pulses.

Full definition of Power Supplies at Wikipedia

A computer power supply is generally mounted in the upper rear of the computer case. It's function is to provide varying voltages to the motherboard and other components that make a PC function. The voltages are 12V, 5V and 3.3V.

The ATX power supply has several connectors on it. A 20-pin connector goes to the motherbord, while numerous 4-wire D-shaped connectors will run other components such as hard drives and CD ROMs. Other connectors will provide power to the floppy and extra motherbord power, if necessary.

The Power supply (often referred to as the PSU) is sometimes the source for a PC not powering up, rebooting or even causing intermittent problems with the computer. The general rule with power supplies is to not skimp, and get a quality name brand with plenty of power for future upgrades.

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