CS550M Modular power supplies are ideal for basic desktop systems where low energy use, low noise, and simple installation are essential. 80 PLUS Gold efficiency reduces operating cost and excess heat. Flat, sleeved black modular cables with clearly-marked connectors make installation fast and straightforward, with good-looking results. The super-efficient operation of the CS550M Modular results in lower energy use and lower operating costs. Since it generates less heat, the fan doesnt need to work as hard, and youll enjoy near silent operation.