Power your system with this 1200W Platinum Series Power Supply. Hysteresis is achieved by a fan control IC, which optimizes how frequently the fan switches on and off. At 25°C ambient temperature the dan turns on when the load rises above 35% (±5%). Due to this lag in response the fan switches on and off less frequently which reduces power loss in fanless and silent mode. The Platinum Series is certified in accordance to the 80PLUS highest standards and offers the newest technology and innovation for performance and energy savings with up to 92% efficiency and a true power factor of greater than 0.9PF.