OMG! That is the only way to describe this extremely high air flow, ultra low noise CPU cooler. Designed for best cooling performance vs noise ratio, the Prolimatech MegaHalems RevB heatsink combined with the 140mm Blue Vortex fan does just that - pushes a lot of air, for a weenie amount of system noise! Whether it is extreme overclocking, defeating a high ambient operating temperature in a hot environment, or just wanting the best cooling with the lowest possible noise output for your media PC, this cooler has got you covered. The included heatsink is designed for low RPM cooling fans and features minimal air resistance between fins. When attached the 140mm Blue Vortex spins at just 1000RPM, however this glacial fan spin speed does not sacrifice performance, with this unit pushing a colossal 87CFM - and all at just 18.1dBA – hence the OMG! With such a high air flow volume, with such a small amount of created noise and including the world's most well designed and manufactured heatsink, the Prolimatech MegaHalems RevB Blue Vortex cooler is a true enthusiast product through and through! Cooler dimensions including mounted fan are (L) 130mm x (W) 99mm x (H) 158.7mm. To get you up and running immediately, the package also includes Prolimatech premium thermal grease - too easy!