EVGA computer power supply with 850W power. It is 80 Plus Gold certified, which pertains to its efficiency relative to its nominal power in Watts. This certification is for high-performance computer power supplies with high consumption or companies with many computers where the benefit is cumulative. It is semi-modular, meaning some of its cables are detachable, which helps in creating a more organized setup with better aesthetic results and airflow. With the Fan Control Button, you can choose the fan's operating mode. Compatible with ATX computer cases.