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.

Cheap computer power supplies tend to come ... perform under certain degrees of power load. Tom's Hardware's best-reviewed power supply units of 2022 is a great place to begin weighing options.

A well-known property of switching mode power supplies (SMPS) like those used in any modern computer is that they’re more efficient at higher AC input voltages. Power supply efficiency at ...