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One thing to note about the Silent Wings PRO 4 is that it has a switch that can be used to alter the fan’s maximum RPM. At Medium, the fan’s max speed is 1600 RPM, at High the fan’s maximum RPM is 2500 RPM, and at Ultra High the fan can run at up to 3,000 RPM. User of these fan can change their max RPMs depending on their desired performance and noise levels. If you are looking at the specifications chart below, we can see that Be Quiet’s latest fans offer much higher static pressure and airflow rating than their predecessors. Be Quiet’s Light Wings fans are the newest fans from Be Quiet that we have tested, offering users lower max RPMs and support for ARGB lighting. In addition to the interchangeable corners (with better ones pre-installed), with the Silent Wings 4 fans with the “Pro” label, you also pay extra for a softer cable with a more robust connector attachment. And, of course, for a three-position switch to limit maximum speeds to about 1750 rpm (HS/High Speed) and 1020 rpm (M/Medium).
The “radiator” corners have both wider and taller arms, which make them fit better with the outer arc of the rotor tunnel. Compared to other types, it seals off any gaps and thus no longer causes unwanted air leaks, which naturally increases the static pressure and thus also increases the overall cooling efficiency, which is also proven in our tests. The radiator corners are pre-installed on the Silent Wings Pro 4, and it should be added that they are only included on fans with “Pro” in the designation. Regular Silent Wings 4’s do not have them and will perform less efficiently on radiators. Admittedly a bit unnecessary, but it’s because BeQuiet! wants to make the more expensive variant of the new fans more attractive. Finally, a 140mm fan that doesn’t wade between the 120mm ones, but has a clear edge over them – even the “best” ones. And it’s a completely different story than its smaller brother, whose biggest negatives are avoided by the 140mm model. But there is one new, rather unnecessary flaw. However, it can be eliminated, with a trade-off. But you might not even notice it, and then you can consider this fan an excellent choice.
Characteristics
Small tip clearance and a fan frame with a funnel-shaped air outlet for extremely high air pressure
We’ve already had one Silent Wings Pro 4 fan here, but this one—the second, larger one—doesn’t look much like it. Visually, though, it doesn’t deny its affiliation with BeQuiet! (and not even to the SWP4 series), but as far as the design is concerned, it’s as if a completely different team of designers worked on it, who didn’t communicate with those from the 120 mm model team at all. And we don’t mean that in a bad way at all. There is also a disproportion in the ratio of tests of cheap things to expensive ones. You don’t have to go far for an explanation here either. The vast majority of tests are commercial ones and there are higher margins on the more expensive stuff, and that means more profit for the test author, because “there is something” to pay his fee from. When it is not done by the manufacturer’s representative himself in the context of paid advertising, there is also a commission model from the units sold in stores. And, of course, from the sale of a hundred pieces of expensive, 700-euro motherboards, there is more in margins than from a fivefold quantity of cheap, 120-euro boards. We know that this is the way it is, but those who are passionate about the professional side of things will be able to resist this temptation. I believe that we are a good example of this, because we often test very cheap things, whether it’s boards, fans or 3 euro SSD coolers and even relatively unknown… have you heard of the brand Axagon? It is possible that you have, but I assume that more people know Thermalright when it comes to SSD coolers.
The symbols weren’t the problem – math is just difficult for me. What is the formula to calculate the area of a vane? Apart from the switch, you can optimize the be quiet! Silent Wings Pro 4 for different purposes by changing the corners. The corners that are optimized for radiator use are installed at the factory. Apart from that, there are corners that avoid vibrations with rubber pads and are thus optimal for use as a case fan. Lastly, there are corners that work with the tool-less pins to attach them to the case. Changing the corners is simple in principle, but not quite as easily done in practical terms. You have to press down two latching lugs on two sides of the corners and pull the corner upwards at the same time. This actually works best with two hands, so you can push with one and pull with the other.
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