How can you tell if your computer power supply is good or bad?

As one of the key components of a computer, the power supply of a computer directly affects the performance and longevity of the computer, so it is very important to choose a good power supply. So, how can you tell if your computer's power supply is good or bad? What are the metrics that need to be judged?

1. 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 strong, whether the switch is flexible or not, whether the interface is complete, whether the power supply mark is clear, and whether the manufacturer is regular.

2. Output voltage and current test

The core indicators of a computer's power quality are the output voltage and current. The output current and voltage of the power supply are measured by a power supply detection instrument. Determine if it meets the design requirements and meets the needs of the computer.

3. Temperature detection

Temperature sensing is a method of evaluating the heat dissipation performance of a power supply. The temperature of the power supply is measured by a thermometer. Generally, when the power supply is working properly, its temperature should be below 50 degrees Celsius.

4. Short circuit test method

Connect the power supply to the motherboard, then use the green and black wires of the power supply to short-circuit the wires. If the power supply fan can rotate normally, the power supply is basically normal.

5. Load capacity test

Let the power supply run under high loads, 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 is cut off in time when the load is too large to prevent damage to other hardware devices.

6. Power efficiency testing

Efficiency is one of the important indicators to measure the quality of power supply. Generally speaking, high-efficiency power supplies have good stability and energy-saving performance, which is suitable for computers that work for a long time.

7. EMI test

Electromagnetic interference (EMI) can interfere with surrounding electrical equipment. By using professional electromagnetic interference test instruments, it can detect whether the power supply will produce interference signals during start-up, shutdown and operation, so as to judge the quality of the power supply.

8. Observe the capacitance

Capacitance is one of the important components of computer power supply, which affects the performance and life of the power supply. It mainly looks at the capacitor for leakage, expansion, and other anomalies.

The above is about the method of judging the quality of the power supply of the computer, if you want to test the electrical performance of the computer power supply produced by the factory, you can also use the automatic test system of the computer power supply of the source instrument, one key to carry out automatic testing, an average of 3-6S can complete the test of all items, saving time and effort.