The toughpower pf1 power supply is available in 650w, 750w and 850w and features high energy efficiency of up to 90% and 80 plus® platinum certification. Thanks to its compact size of 140 x 86 x 150 mm (d x h x l), the power supply finds its place even in cramped systems and facilitates cable management. The 120 mm fan features an intelligent speed control and impresses with its excellent cooling performance, with an almost inaudible operation. Thanks to smart zero, the fan only starts when the load exceeds 30% of the power supply. Furthermore, the series is optimized for intel processors to achieve maximum energy savings. Thermaltake also offers a 10 year warranty on the toughpower pf1. Technical data colour: black dimensions: 150 x 86 x 140 mm (w x h x d) power: 850 w, efficiency up to 92 input voltage range:100-240 volt standard: atx12v 2.4 type: atx certification: 80 plus platinum switch: 1x power switch connectors: 1x 24-pin atx12v-2.x, 2x 4+4-pin-12v, 4x 4-pin-5.25", 4x 6+2-pin graphics, 9x 15-pin sata cable: mainboard connector: 24-pin (60 cm), mainboard additional connector: 8-pin (65 cm), drive connectors 5,25" (50,15,15,15 cm), drive connectors sata (50, 15, 15 cm), graphic connectors 6 / 8 pin (50, 15 cm) cable management: yes cooling: 1x 120 mm fan (semi-passive, temperature controlled) volume: 0 db(a) at 20% load, 24 db(a) at 100% load protective functions: protection against current peaks (ocp), overvoltage protection (ovp), undervoltage protection (uvp), overload protection (olp/opp), short-circuit protection (scp), overheating protection (otp).