Introducing you the newest line up of BitFenix power supplies that boasts of extreme quality and worlds best performance with 80+ Gold Efficiency and up to 92% efficiency at typical loading. The new BitFenix Whisper power supply line up comes with a wide range of power options starting with 450W all the way up to 850 incrementing by 100W. 100% Industrial Japanese Capacitors BitFenix Whisper power supplies uses 100% Japanese Industrial Capacitors ensuring tightest DC voltage regulation within 2% and longest component life. Unlike standard Japanese Capacitors which are rated to work at a maximum temperature of 85C, the Japanese Industrial Capacitors available in Whisper can function at a maximum temperature of 105C Ultra Efficient Whisper is rated at a Power Factor of 0.99, and is extremely efficient with an 80+ Gold efficiency certification. With 87+ (20% to 100% load)/ 90+ (40% to 70% load) high efficiency design, Whisper saves both energy and money for the user while providing extremely stable power output at a very low noise level Dedicated Quad Rails A dedicated quad rail design together with an advance voltage switching circuit from +12V to minor rail provides the best stability and output quality. The main quad +12V rails on all BitFenix Whisper models are dedicated as Motherboard + Peripherals, CPU, GPU 1 and GPU 2 (450W and 550W models only come with GPU1). All of these rails have dedicated Over Current Protection (OCP) circuits to keep your High-End-components safe all the time Support up to Industrial Servers With availability of dual CPU 4+4pin cables on 750W and 850W, BitFenix Whisper not only supports mainstream systems, but also extreme over-clocking motherboards, dual CPU setups, Industrial servers and workstations https://www.bitfenix.com/global/en/products/power-supplies/whisper-m#overview