Enermax Triathlor 650W ATX12V/EPS12V 80 Plus Bronze Certified Modular Power Supply ETA650AWT-M ATX12V v2.31 ready! Compliant with the newest standard for desktop power supplies. 82PLUS ready! 82-88% efficiency @ 20-100% load. Compliant with 80PLUS BRONZE efficiency requirements. Stability ready! DC to DC converter design lowers energy loss for higher efficiency and better dynamic response and cross regulation. 12V Synchronous Rectifier design for higher efficiency and greater power density. Zero Load Design Stable voltage output even at 0W load, that supports the energy-saving functions of modern CPU and graphics cards (C6 State/Hybrid Mode) and prevents compatibility issues. T.B. Silence fan inside! Integrated T.B. Silence 12cm fan with patented Twister Bearing to reduce the noise and prolong lifetime. Air Guard, Safeguard, Speed Guard, DXXI , and Power Up ready!