The Noctua NF-A14x25 G2 fans proved to be convincing when tested and are at the top of the performance/volume ratio. Of course, the price is high and so are the expectations in terms of performance. But even if I put the best 140 mm fans to date up against the Noctua newcomers here: The NF-A14x25 G2 pull ahead in terms of performance and remain quieter...