Thunderbolt 1200W Power Supply ATX 1200 Energy Star Certified Power Supply TTBK20G Efficiency performance up to 90% with 80Plus Gold certification Quad +12V rail design providing up to 100A (1200W) Modularized Cable Management Complies with all the latest Intel and AMD CPU Designed to sustain at 50C ambient with full wattage output Active PFC circuit helps to provide perfect PF value &gt; 0.99 Supports ATX 12V V2.3 and EPS 12V V2.91 standards 135mm Ball Bearing Fan with smart fan control circuit to provide better system airflow