Power supply to provide power to the electronic equipment device, also known as the power supply, which provides power to all components in a computer required. Power of size, current and voltage is stable, it will directly affect the computer's performance and service life.
High-quality power supply generally has FCC, UL and the United States, such as the Great Wall of China multi-national certification mark. The certification is a certification body according to the technical specifications of the power industry to develop professional standards, including the production process, electromagnetic interference, security, etc., all products meet certain targets in the declaration of authentication to use the certification mark on the packaging and the product surface, having a certain authority.