Corsair CMPSU-950TX 950-Watt TX Series 80 Plus Certified Power Supply Compatible with   Core i7 and Core i5 Over Current/Voltage/Power Protection, Under Voltage Protection and Short Circuit Protection provide complete component safety 105C rated industrial grade capacitors provide uncompromised performance and reliability Double forward switching circuitry design offers high efficiency, up to 85% under real-world load range. Guaranteed to sustain its full rated wattage at an ambient temperature of 50C # Ultra-quiet 140mm double ball-bearing fan delivers excellent airflow