The Elista 450W SMPS power supply is a type of switch-mode power supply that is designed to convert AC power from a wall outlet into the DC power needed to operate electronic devices. It is rated at 450 watts, which means it can provide up to 450 watts of power to connected devices. Some of the features of Elista 450W SMPS power supply include high efficiency, low noise, and a compact size. It is commonly used in computer systems, gaming systems, and other electronic devices that require a reliable power source.