90% efficiency under typical load. Compliance with Intel ATX 12V 2.31 & SSI EPS 12V 2.92 standards. 105 Degree / 221 Degree High quality Japanese capacitors. Warranty: 5 Years. Ultra-quiet 135mm fan with smart fan control. Semi modular design with low profile black flat cables. Power Good Signal: 100-500ms The Tough power 1200W adopts a 135mm cooling fan with intelligent RPM control. This guarantees superior cooling performance and silent operation