Linkworld Electronic LLC. Link Power 850W ATX 850 Power Supply (LPS26-850) 850 watts true-wattage rated Energy-Efficient: 81.11% Minimum, 83.32% Typical Flat modular Cable Design for neat Internal System Cabling with Better Internal Airflow Silent Low-RPM 140mm Cooling Fan, Low Heat & Low Noise Thermostat Dynamically Control Fan Speed - Virtually fanless Quiet Active PFC for Reduced Harmonic Distortion nVidiaSLI, ATI Radeon Crossfire, CrossFireX, FirePro Ready RoHS Compliant Lead Free