Corsair Enthusiast Series 850-Watt 80 Plus Bronze Certified Power Supply Compatible with   Core i3, i5, i7 and   platforms - TX850 A dedicated single +12V rail offers maximum compatibility with the latest components. High-quality Japanese capacitors provide uncompromised performance and reliability. Over-voltage and over-current protection, under-voltage protection, and short circuit protection provide maximum safety to your critical system components. 80PLUS Bronze certified, delivering up to 85% energy efficiency at real world load conditions. An ultra-quiet double ball-bearing fan delivers excellent airflow at an exceptionally low noise level by varying fan speed in response to temperature. 80PLUS Bronze certified, delivering up to 85% energy efficiency at real world load conditions. Over-voltage and over-current protection, under-voltage protection, and short circuit protection provide maximum safety to your critical system components. An ultra-quiet double ball-bearing fan delivers excellent airflow at an exceptionally low noise level by varying fan speed in response to temperature. High-quality Japanese capacitors provide uncompromised performance and reliability. A dedicated single +12V rail offers maximum compatibility with the latest components. The latest ATX12V v2.31 and EPS 2.92 standards and it is backward compatible with ATX12V 2.2 and ATX12V 2.01 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 Corsairs legendary technical support and customer service.