Power Supply Units (PSU)
Power Supply Units (PSU) are critical components in any computer system as they are responsible for converting the AC (Alternating Current) power from your wall socket into the appropriate DC (Direct Current) voltages required by internal components such as the CPU, GPU, RAM, storage devices, and motherboard. PSUs are available in different capacities and form factors to accommodate different system configurations. They also come with various efficiency ratings (80 PLUS being a common standard), which correlates with the power conversion efficiency, thereby reducing excess heat and saving on electricity costs. Lastly, high-quality PSUs include safety features like Over Voltage Protection (OVP) and Over Current Protection (OCP), which protect system components from potential damage due to power fluctuations or surges.
Guide: Power Supply Units (PSU)
What is a Power Supply Unit (PSU)?
A PSU is a hardware component that supplies power to the computer by converting electrical energy from the power source to the correct voltage, current, and frequency required by the PC.
Why is it Important?
A PSU is important because without it, your PC won't function. It's also responsible for protecting your computer from power surges or fluctuations that could damage the system.
How it Works?
PSU takes AC input, applies a transformer to step down the voltage, rectifies it to convert it into DC, filters out the AC ripples and regulates it to produce a consistent DC output. Most PCs use a switching power supply.
Exam Tips: Answering Questions on Power Supply Units (PSU)
When answering questions about PSU in exams, it's important to:
- Understand how PSU works as it's a common topic.
- Know the different types of PSU and their advantages and disadvantages.
- Remember the importance of having a PSU of correct wattage. Too low can cause system instability and too high can be an unnecessary drain on your power bill.
- Recognize the signs of a failing PSU as this is a common topic in trouble shooting questions.
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