Dark Power Pro supplies are already renowned as the world's quietest PSUs in the high performance category. The Dark Power Pro 10 850W model takes that a giant step further with an all-new design topology that delivers 80PLUS Platinum performance, the world's highest energy efficiency certification. Add to that an unparalleled array of enhancements that augment this unit's compatibility, convenience of use, reliability, and safety, and the result is simply a power supply without equal. Simply put, this is the highest-powered, most technologically-advanced power supply be quiet! has ever built.