The Corsair RM850x is a modular ATX power supply unit with a power output of 850 watts. This power supply unit has been designed to make as little noise as possible. As such, it has silent components and a specially designed fan that only runs when the power supply unit is under a heavy load. In addition, the RM850x has an 80 PLUS GOLD certificate which makes it very energy efficient. The Corsair RM850x is modular, which means that the cables are removable. This way, you only have to connect the necessary cables to the power supply unit and to the components. This ensures that you won't have any loose cables in the computer case. As a result, your computer looks cleaner and the airflow is improved.