All power supplies have a power input connection, which receives energy in the form of electric current from a source, and one or more power output or power rail connections that deliver …

电源供应器（电脑电源供应单元，英语：PC Power supply unit，简称PSU或电源），是计算机所有部件供电。 香港又称火牛， (乃电牛也，电力供应者，源于早期变压器造型似牛)。

Dec 2, 2025 · Explore the role of a power supply unit in powering computer components by converting AC into low-voltage DC. Learn about its parts, safety, and buying tips.

The power supply converts the power from the source into the correct format and voltage. Because various options exist, the specific power supply function depends on whether it needs …

A power supply is an electronic device that converts incoming electrical energy from a source into the appropriate voltage, current, and frequency required to power electronic devices or …

Jan 16, 2025 · A power supply is an essential device that provides electrical power to an electronic system. In simple terms, it takes electricity from a source (like a wall outlet) and …

Sep 20, 2025 · What is a power supply? A power supply, also known as a PSU (Power Supply Unit), is the component responsible for converting electricity from the grid into a form usable …

Oct 2, 2025 · A power supply converts an electrical current from a source, such as a wall outlet or battery, into the necessary voltage, current, and frequency to safely and efficiently power a …

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 …

A power supply is defined as the interface between an external power source, which may be noisy and variable, and the clear-cut requirements of internal circuitry in electronic products. It …