Costing just under $65 (£80), the EVGA 600 BR is undoubtedly one of the best ... ratings that tell you how much power the components of your PC can safely draw from the power supply and how ...

A computer power supply converts AC into multiple DC voltages. For example, 12 volts is commonly used for drives, while 3.3v and 5v are used by the chips and other motherboard components.