The Guru of 3D posted a review on the be quiet! Dark Rock Elite
A quote from the article:
In this review, we dive into the performance of the be quiet! Dark Rock ELITE CPU cooler. The Dark Rock Elite integrates a cooling system that incorporates seven heat pipes in tandem with two 135mm Silent Wing PWM fans. Users can toggle between these modes using a switch conveniently located on the cooler.be quiet! Dark Rock Elite Review