The Thermaltake Toughpower series is a premium 80 PLUS GOLD certified power supply that uses the highest quality components for stable performance, exvellent features with unbeatable efficiency vital to the current high-end system in market even in demanding conditions. With the 80Plus Gold certification for its high power efficiency, and a single strong 12V rail flexibly routes the maximum available power to your CPU and graphics card, offering maximized power usage and easy setup. Toughpower 550W GOLD (Modular) comes with modular design to reduce cable clutter; and ultra-quiet fan delivers silent cooling, thus the entire computer and power supply can operate at its peak moment.