be quiet! Silent Wings 4 120mm PWM, Premium Cooling Fan, 4-Pin, Black (BL093)

£9.9
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be quiet! Silent Wings 4 120mm PWM, Premium Cooling Fan, 4-Pin, Black (BL093)

be quiet! Silent Wings 4 120mm PWM, Premium Cooling Fan, 4-Pin, Black (BL093)

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As for the actual corner types, the Silent Wings Pro 4 has up to three. Standard, anti-vibration and corners optimized to work more efficiently on liquid cooler radiators. These are the largest ones, pictured left. Compared to the other types, they increase static pressure on the radiators, and it’s not just a marketing phrase. I’m really trying to figure out what to use to test. hotwire (e.g Testo 405i), tiny fan (e.g Testo 416), Pitot (e.g. Reed Instruments R3001), or something else. I feel that the ProtMex has too much resistance to low windspeed.

besides that I have B12-PS that indeed has a really nice sound profile of wings, possibly even better than A12x25, but the motor itself is really whizzy, honestly I’m not sure what were the speeds, but the motor is audible basically from the start and only fades out when the wings noise becomes a concern for me Even though the airflow is turbulent, there is still laminar flow along the wall of the tunnel, which is why I decided to build a wider one to minimize that problem. There’s nothing I can do about turbulence other than that, too, aside from adding in the airflow “straightener”. Yes, there is much I do not know, and it’s likely that some of that I will never grasp or will always struggle with. I strive to learn and improve anyways. Thank you so much for your response! At another time, please explain “the basic condition of zero airflow and a number of smaller details must be fulfilled”. I am happy to learn! I have come to wonder if it would be best to just start publishing what results I have from the U12A testing I’ve done. I have testing in triplicate for the Noctua NF-A12x25, and the DeepCool FK120, and I’m almost done with the Akasa Vegas R7.For the test of the be quiet! Silent Wings Pro 4 120 mm and some comparison fans, the performance of the case fans was set to static low speeds. In addition, the AMD Ryzen 9 5950X was used for performance comparison, which draws around 120 W in the test system during the Allcore Cinebench run (4.25 Ghz at 1.15V). Here, the DeepCool LS720 is used as the AIO, which is installed in the front of the Fractal Design Pop XL Air. For measurement, the cooling system is heated up for 8 minutes and then the average temperature of one minute is measured. Lastly, the temperature delta is achieved, which is the temperature difference between the room temperature and the CPU temperature, so that the results are not distorted by fluctuations in the room temperature. Speed We are currently preparing a methodology to test external SSD boxes, which similarly won’t be sold by a brand and aren’t high margin items either. We consider it useful anyway, since tests of this type are missing on the Internet. One thing that irks me about some testers (ignoring the shills and frauds) is that they continually focus on certain brands and models, and ignore the many other options out there, many of which are not cheap. That’s part of why I have fans from 82 different brands – 1 to 18 models per brand. Because I believe that PC fans are vastly overpriced, I am focusing on (almost exclusively) lower-cost fans, understanding that what may be expensive here might very well be cheap elsewhere, and vice versa. Later, I will add in the expensive fans, assuming I can afford to do so, although I’ll probably ignore any fan over a certain price. It is difficult with me though and I have reservations about almost all testing methodologies. And TechPowerUp is no exception. I won’t elaborate on it, so it doesn’t sound too offensive (it’s true that from the “competition” it probably wouldn’t be appropriate), but the generic tunnel (probably created by Corsair? I’ve seen it also in some Gamers Nexus videos…) is far from being able to talk about some accurate results of measured airflow. Also Aris (HW Busters) with Longwin LW-9266 is fine, he has a great device on his hands, but my opinion is that he can’t get too much useful data from these measurements. Anyway, he is, of course, mainly a specialist in power supply topics and he has fans as a side job. You will need to delve deep into these topics to get relevant results. In my opinion, and now I don’t mean this in a bad way at all, you get too hung up on measuring devices at the expense of design features and knowledge of the basics, without which you can’t really move. I certainly don’t want to discourage you and on the contrary you have my support, as far as know-how and having more time are concerned, we can communicate for hours and hours internally, but… you really need to have control over the physical phenomena involved and look at the formulas from ThermalLeft. You will need them if the goal is to interpret the measured airflow values correctly. In principle, it is not complicated and you can create a spreadsheet calculator in which you enter only the input (the measured value on the anemometer in meters per second, for example). After entering all the variables, you then get the corresponding value in cubic units at the output.

The justification for the extra 7 EUR over the standard SW4 is also for a speed switch or limiter, which the Silent Wings Pro 4 have in addition. The latter has three stages, where the slowest (M, medium) reduces the maximum speed to about 1575 rpm, the medium (HS, high-speed) to about 2367 rpm and the UHS (ultra high-speed) reaches a maximum of about 2800 rpm. But all in all there's definitely something to like here for PC gamers. Fans are an often overlooked piece of any PC build, but they really make a difference to your PC gaming experience, both in terms of cooling performance and noise. It's good to see some firm competition (namely from Noctua) keeping manufacturers striving for more. In short, the previous or say traditional shape of axial rotors, can never outperform the state-of-the-art design that minimizes the relatively inefficient sideways airflow because of the airflow angle, which pushes a large part of the streamlines well off the axial direction of airflow. It’s inefficient because there is more friction between the frame and the blades and hence more noise, which reduces what we call efficiency (the ratio of airflow intensity to noise level).The be quiet! Silent Wings Pro 4 are all-rounders that you buy for a long period of use. With these fans, you have high-quality premium fans that you can use in a wide variety of places. So they can definitely serve as radiator fans in one computer and as case fans in the next. If you plan to use the Silent Wings in only one computer and know exactly which positions to use them in, you can save quite a bit of money with the regular be quiet! Silent Wings 4. The high-speed variants are very good for radiator use and the other models can be used optimally as case fans. Still, you don’t sacrifice quality this way, just the flexibility of the switch. 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. I’m planning on finding a large radiator (in excess of 8″x8″) to simplify the matter. I am also considering cutting a viewing port in the wall and placing crepe paper to show the airflow, although I’m not sure if this is useful without a paper with a scale on it on the far side, nor am I sure where it would be best to place it and how much it’d distort the results. Do you have any thoughts or suggestions? So, I’d also like to test SP. My budget is quite limited, so I’m hoping to find either an all-in-one, or an anemometer and a separate manometer that I can connect multiple sensors to get a fan curve from. I chose a larger one because I was trying to reduce laminar flow affecting flow.” Laminar flow, on the contrary, is a requirement. Turbulent flow is what needs to be reduced when measuring airflow. You will measure a lower/distorted airflow due to it.

I wouldn’t talk about what each tunnel must or must not contain. It depends on overall aerodynamics and how the fan is measured. For example, the flow straightener in some tunnels may be useful, in others it may not. Personally, I consider it an element that unnecessarily increases the resistance of the tunnel itself, which is undesirable for airflow measurement. Therein lies some of that flexibility that Be Quiet is talking about with the Silent Wings 4, and if you're the type to reuse fans for all manner of purposes over their lifetime, perhaps they're a better all-round fit than some individually. Though that also means they're perhaps not as good for each task as a more bespoke designed fan would be. However, the 140 mm variant naturally has a larger outer cross-section by some 37% (i.e. the active one, with blades). Thanks to the larger blades, it achieves a higher air flow even at lower speeds, but the static pressure is already lower. The gaps between the blades are considerably larger than in the 120 mm model, where they (the gaps) are really cramped. In the case of the 140 mm fan, the relative distances, due to which the static pressure drops, between the individual blades are quite large. For longer blade lengths a higher airflow is achieved, but this is especially so in a non-restrictive environment which offers little resistance to the fan. This means that the airflow drops considerably faster due to the obstacle. The more complicated the obstacle is (in terms of constraints on the fan), the smaller the advantage of the 140 mm fan over the 120 mm variant. Please don’t ask me to judge individual YouTubers. Again, I don’t watch that many of them, but when I do come across something, I’m usually not at all comfortable with the fact that some things are allowed to happen, and what’s worse, that people adopt them as “truth”.BeQuiet! has shrunk the gap between the ends of the blades and the frame between generations (from 1.2 to 1.0 mm), but it’s still twice the size of the Noctua NF-A12x25 fan that the Silent Wings Pro 4 will be unavoidably compared to. This, too, is a testament to the fact that the BeQuiet! is bluffing and knows that the blades do stretch a bit. As part of some bonus article later on, we’ll try to capture this for you in some macro photos, which show it well with the right lighting.

obviously when we start to measure up these there may be some inconsistencies, partially coming from different placement in the case, different heatsinks used, possibly also from the natural difference of my hearing from the “standardized” A-function, giving different dB(A) values for each of these fans, but I’m hoping it would be at least something that can be reasonably averaged

Features

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.



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