Enermax Triathlor ECO 450W 80 PLUS Bronze Certified ATX12V & EPS12V SLI Ready CrossFire Ready Semi-Modular Power Supply, ETL450AWT-M 82-88% efficiency at 20-100% load. Compliant with 80PLUS BRONZE efficiency requirements. Facilitate system installation, reduce cable clutter, and enhance internal airflow and cooling performance Durable two ball bearing fan with advanced fan speed control for optimal cooling, minimum noise, and longer lifetime Highest component standards for maximum durability and stability Advanced technology of load balancer stabilizes voltage output to support C6/C7 states of Intel Haswell CPU Non-Stop industrial class performance at 40 DegreeC/104 DegreeF ambient. Advanced fan speed control for optimal cooling and minimum noise(Patented) Keep PSU fan running for 30-60 seconds after shut down to dissipate the remaining system heat and prolong system lifetime