After 14 days of trial operation, I can now say is that my fears were unfounded. The fan cools my CPU in idle reliably at 25 - 31 ° C. Even under load I've never seen the 65 ° C mark crack the CPU. The cooling capacity seems so current CPUs to be still growing.
Why then I subtract a star? For this purpose, the fixing of the actual fan is solely and exclusively responsible. It consists of 4 "elastic loops" which are mounted on the heat sink and so the vibrations are to decouple. Firstly, it is an extreme Fummelarbeit, mount them correctly. Secondly, it can be assumed that the rubber to age a few years and will tear. On the net I have already found several reports of Dark Rock Advanced gums who after some years acknowledged their service. Incidentally, a clear advantage because of an "older" model to buy. There are already "long-term tests". Although seen be quiet! here probably currently still quite accommodating and replaced the torn rubber. However, it is probably a matter of time until be quiet! will reject the support for the Dark Rock Advanced. Finally, the model is now already almost 7 years in the market (as of 01/2015). I personally would have metal braces as they come for. B. the Dark Rock 3 are used, have been much better. Although located in a pair of metal brackets, but this serves to attach a second fan on the other side of the heat sink. To replace the rubber they are unfortunately not suitable because too large or long.
Conclusion: Certainly not the cheapest CPU fan, but one that is well worth the money definitely. One makes with the purchase of Dark Rock Advanced certainly nothing wrong, but due to the limited life of the rubber, I'd rather to advise 10 to invest more and the "Dark Rock 3" to order. The values of the two models are quite similar and visually they do is a tremendous amount. Be quiet now has obviously also recognized the "design flaw" of torrential gums, because none of the current models still used rubber as a holder for the fan. However, this model has not yet.
It should be noted would be that you may have to adjust depending on the type slightly the PWM settings on the motherboard. . My motherboard for example, the speed set by default very low (probably to prevent noise), so that the temperature initially in section 5 - 7 ° C higher than now lay. With such a quiet fan can enjoy the performance but quietly turn up something. Listen you still do not do it. He turns now on average at 1050 rpm and its job so perfectly (see above).
Addendum (02/04/2015): I had be quiet! written and asked if we could possibly order a precautionary measure metal brackets for the radiator, because the rubber would indeed known to tear at some point. Here top I was told that this was not necessary because the rubber compound of the holders had already been changed because of the known problems and there were no more complaints since then. So you can only wait and hope that's true.