PSU in a computer stands for Power Supply Unit, a vital component that converts and regulates electrical current for a computer's internal parts.
Understanding the Power Supply Unit (PSU)
Despite its name, a Power Supply Unit (PSU) does not actually "supply" power to a computer system. Instead, its primary function is to convert and regulate the electrical power it receives from a wall outlet. This conversion is crucial because computer components require a specific type and level of electrical current to operate safely and efficiently.
As highlighted by Techbuyer, a power supply unit performs two key functions:
- AC to DC Conversion: It converts the alternating high voltage current (AC), which is typically supplied by wall outlets, into direct current (DC). Computer components, such as the motherboard, CPU, GPU, and storage drives, all operate on direct current.
- Voltage Regulation: The PSU also meticulously regulates the DC output voltage. This regulation ensures that the voltage supplied to sensitive computing components adheres to the fine tolerances required for their stable and reliable operation, preventing damage from power fluctuations.
Essentially, a PSU acts as an interpreter for electricity, taking the raw power from your wall and transforming it into the precise, clean energy your computer needs. Without a functioning PSU, a computer cannot power on or operate correctly due to incompatible or unstable electrical input.
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