Power supplies are responsible for feeding clean, stable juice to the sensitive components inside your PC. Calling it one of the most important components you'll buy is not an overstatement.
Choosing a power supply
There is no single, universal rule for selecting a high-quality power supply.
Nevertheless, various indicators provide circumstantial evidence of PSU quality,
and some guidelines are generally helpful. First, always buy a power supply from a
reputable manufacturer, and look for reviews of it before you buy. Avoid cheap,
generic power supplies, which tend to be substandard. Look for reputable brands
that offer solid warranties and support. Corsair PSU, be quiet! PSU, and Antec PSU are three manufacturers
with reputations for producing high-quality power supplies, though even they may offer a few duds among all the studs.