In short: I do not know any better CPU fan - if you have enough space in its housing. Powerful and ultra quiet directs the United Clock'ner away the heat from the core, so that even in a cupboard built tower can be operated without any problems. The fan speed can be continuously regulated with an external controller, which can be laid outside of the housing. Even at the highest setting, the fan remains pleasantly quiet. Since I delivered at the cores fan was used previously only me, both the size and the performance of this product has impressed. Even in the later comparison with other fans of the big Clock'ner nose had for me again. When the CPU needs a good cooling, you can safely access here.