As a key component of the computer, the computer power supply directly affects the performance and life of the computer, so it is very important to choose a good power supply. So how to judge the quality of the computer power supply? What are the indicators for judgment?
Appearance inspection
Observing the appearance of the power supply can preliminarily judge the process quality and material quality of the computer power supply. Appearance inspection needs to check whether the power supply shell is sturdy, whether the switch is flexible, whether the interface is complete, whether the power supply logo is clear, whether the manufacturer is formal, etc.
Output voltage and current test
The core indicators of the quality of computer power supply are output voltage and current. Use a power supply detection instrument or a multimeter to measure the output current and voltage of the power supply. Determine whether it meets the design requirements and whether it can meet the various needs of the computer.
Temperature detection
Temperature detection is a method to evaluate the heat dissipation performance of the power supply. Use a thermometer to measure the temperature of the power supply when it is running. Usually, the temperature of the power supply should be below 50 degrees Celsius when it is working normally.
Short circuit test method
Connect the power supply to the motherboard, and then use a wire to short-circuit the green and black wires of the power supply. If the power supply fan can rotate normally, it means that the power supply is basically normal.
Load capacity test
Let the power supply run under high load and observe its working stability and safety performance. This test method should pay attention to the power overload protection function to ensure that the power supply can be cut off in time when the load is too large to prevent damage to other hardware devices.
Power efficiency detection
Efficiency is one of the important indicators to measure the quality of power supply. Generally speaking, high-efficiency power supplies have better stability and energy-saving performance, and are suitable for computers that work for a long time.
EMI test
Electromagnetic interference (EMI) may interfere with surrounding electrical equipment. By using professional electromagnetic interference test instruments, it is possible to detect whether the power supply will generate interference signals during startup, shutdown, and operation, thereby judging the quality of the power supply.
Observe the capacitor
The capacitor is one of the important components of the computer power supply, which affects the performance and life of the power supply. Mainly observe whether the capacitor has abnormal phenomena such as leakage and swelling.
