Corsair Enthusiast Series CP-9020039-NA650W ATX12V v2.31 / EPS12V 80 PLUS BRONZE Certified Modular High Performance Power Supply 80PLUS Bronze certified, delivering up to 85% energy efficiency at real world load conditions. A dedicated single +12V rail offers maximum compatibility with the latest components. Exceptionally low noise level by varying fan speed in response to temperature. Over-voltage and over-current protection, under-voltage protection, and short circuit protection provide maximum safety to your critical systems Universal AC input from 90~264V. No more hassle of flipping that tiny red switch to select the voltage input! A five year warranty and lifetime access to Corsair's legendary technical support and customer service. The latest ATX12V v2.31 and EPS 2.92 standards and it is backward compatible with ATX12V 2.2 and ATX12V 2.01 systems. An ultra-quiet double ball-bearing fan delivers excellent airflow