"The Noctua NH-U9B is a refined take on the previously successful NH-U9 heatsink. This time around, Noctua nickel plate all copper surfaces and bundle in the super quiet NF-B9 fan - and it's not your average vaneaxial fan either. That's all well and good, but you probably want to know if Noctua's NH-U9B is one of the few heatsinks able to break away from the "low noise handicap" and perform more like a performance cooler? In other words, is it good? "