jmke

It's one of the most important components in your computer. Nothing will work without it, and yet it doesn't receive a fraction of the attention it deserves. It's the power supply.

Why is the power supply so important? The reason is simple: every other component in the PC depends on stable power for trouble-free operation. Even relatively slight deviations in voltage can lead to crashes and component failures, a fact many users are still unaware of. When a PC is unstable, the first things they suspect as the cause are overly-aggressive memory timings, an overheated graphics card or an overclocked CPU. Very rarely does the power supply unit come under scrutiny, despite its being one of the most problem-prone components! Reason enough for THG to take a closer look at these critical parts.

http://www.tomshardware.com/howto/20041223/index.html

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