Micro Tolerance Load Regulation (less than 0.5%): Impressive electrical performance and stability make this power supply an excellent choice for high performance systems. Fully Modular - Use only the cables you need to eliminate clutter and improve airflow for more ventilated systems. 80 Plus Titanium - Less energy wasted in power conversion. Environmentally friendly by reducing power consumption. PREMIUM HYBRID FAN CONTROL: Unparalleled silent performance in fanless mode. A fan control button on the back of the PSU allows users to choose between Seasonic S2FC (fan control without fanless mode) and S3FC (fan control with fanless mode) to customize their cooling needs .