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be quiet! BL070 Silent Wings 3 120mm PWM high-speed, cooling fan, Black

£9.9£99Clearance
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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. As you can see on both intake and exhaust, these fans offer “optimized airflow” by providing their blades with a wavy shape. The furrows follow the air across the blades to smooth the airflow. It seems to work: these are quiet fans. So the 1000 RPM slow speed version is not a radiator fan. For that one should try the highspeed version that nominally runs at 1650 RPM. But let us now look at the PWM control:

An image from be quiet! showing an anti-vibration fitting on the corner. BTW, be quiet! has a PDF manual that shows you how to take these corners off. The manual has a diagram that helps us see just how vibrations are not transmitted with this corner fitting. Anti-Vibration Fitting Test Setup And all the fans are built with PBT, the same plastic that's best for gaming keyboard keycaps. Be Quiet says in their testing these fans worked just fine for really long periods, and say that even for four of more years of maximum RPM, there shouldn't be any sign of impeller creep. That's basically when the constant spinning and centrifugal forces on the blades causes them to stretch out, which, you might have guessed, isn't ideal. Undoubtedly the fans are an integral factor in minimizing the noise levels of the products in the be quiet! portfolio.Specially developed Silent Wings and other be quiet! fans are used throughout all product ranges. They are equipped with a variety of noise-reducing features, such as special bearings, smooth motors, optimized airflow and vibration decoupling. Thanks to these fans be quiet! products attain a perfect balance of ideal cooling performance and virtually inaudible operation.

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Could be BeQuiet phased out the SW3s because there was a problem with using the pwm versions with AquaComputer Aquaeros. A speed range under PWM of greater than 500 %! Quite the range. If the highspeed version of the SW3 is like this it will be a fabulous rad fan. Availability and Price

Fluid dynamic bearings are an expensive option. FDB adds to the cost of a fan. Frame-shaping we have seen before. Specifications Where the Silent Wings 4 finds more success is when it comes to pressure. The standard 120mm model manages 1.79 mm/H₂0 at 1,600 RPM, but up to 3.86 mm/H₂0 at full speed. That makes it a great fit for radiators, and up there with the likes of Corsair's SP120 static pressure fans at 1.45 mm/H₂0 at 1,400 RPM. The Noctua NF-S12B isn't the fan you'd want for this purpose at 1.31 mm/H₂0 at 1,200 RPM, instead you'd be better off with something like the NF-P12 redux. The airflow was assessed using a standard measure, cubic feet per minute, or CFM. The air entered a sealed 8″x8″x8″ box (200+ mm on a side) where it was allowed to mix. The air left the box through an exhaust port, where it was measured with the vane head of an Extech AN100 anemometer, averaging 10 readings per fan setting. The fans were tested in an unobstructed state, with a metal mesh dust filter and on a 30 FPI rad. Test Results

SW3 fans were originally designed by BeQuiet to be used with their cases, which included additional circuitry to "pull up" the pwm signals applied to them to 5 volt levels (you couldn't control pwm SW3s using the Aquaero unless you added additional circuitry to raise pwm signal levels to 5V; a similar issue was experienced using pwm pumps with the Aquaero). This was determined by IT DIVA on OCN, and she eventually designed an addon circuit that provided properly spec'd pullup resistance. The fans were installed with what be quiet! calls “hard plastic fittings” on the corners. Belying their name they have rubber cores designed to attenuate vibrations. To finish the job they fasten these fans with rubber washers. Installed fans close up A Closer Look For the SilentWings 3, be quiet! has also developed a new installation system. The system doesn't just feature special anti-vibration properties, but also allows for an easier assembly. Thus the SilentWings 3 can be mounted to coolers, radiators and to corresponding fan mounts in a PC case. Compared to its predecessor, the modular corners of the frame can be exchanged easier. Two included sets lead to a higher flexibility during installation.

The ambient noise for this set of testing is 31 dBA. To make sure we could measure noise levels that were softer than 30 dBA, the Sound Pressure Level (SPL) was set 10 cm from each fan. SPL was adjusted to 1 meter by subtracting 20 dB. The sound pressure meter is a Tenma 72-942. This fan tester has a microphone which is not accurate under 30 dBA. This is the limit of all but the most expensive SPL meters. At low levels sound measurement by extrapolation is not accurate, so that sound measurements are approximate. To make the SilentWings 3 into an absolute high-end product, be quiet! utilizes an advanced fluid-dynamic bearing with a brass core. The combined technology in this fan allows a lifespan of 300,000 hours. This applies to all four variants of the two available sizes (120 and 140 millimeters): be quiet! offers the SilentWings 3 in a 3-pin and PWM variant, and these are both also available as High-Speed editions. Despite its high performance, the SilentWings 3 from be quiet! is almost inaudibly quiet: the 120-millimeter variant produces a sound level of 16.4 decibels, while the 140 mm model produces only 15.5 decibels. The highly efficient, three-phase 6-pole fan motor and the rubberized frame contribute positively to this: both parts reduce vibrations to a possible minimum. In addition, the advanced, high-quality IC motor control effectively prevents electrical interference.The Silent Wings 3 are quiet fans. Their airflow is about mid-range but they are among the quieter case fans. Arguably with the other corner mounts, it would be quieter still. Today we’re having a look at the be quiet! Silent Wings 3 case fans that came with the recently reviewed Dark Base Pro 900. These fans are available in 120/140mm sizes at two different speeds of 1000 RPM and 1650 RPM as PWM or DC and are available at many retail outlets. We received the three as part of a Dark Base Pro 900 case, two intakes behind a dust filter in front and one exhaust. Fans Behind Filter 3 Fans in Case Anyway, AquaComputer eventually added similar circuitry to the SPLITTY9 Active and QUADRO products, which helped mitigate the problem down the road.

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