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🔇 Silence Meets Speed: Cool smarter, not louder.
The be quiet! Silent Wings 4 120mm PWM High Speed fan combines cutting-edge fluid-dynamic bearing technology with a powerful 2500 RPM motor to deliver exceptional 76.7 CFM airflow at an ultra-low noise level of 31.2 dB. Designed for professional-grade cooling in cases, radiators, and heat sinks, it features anti-vibration mounts and a funnel-shaped frame for optimized air pressure and whisper-quiet operation, making it the go-to choice for high-performance, noise-conscious PC builds.








| ASIN | B0B6WPZFBX |
| Air Flow Capacity | 76.7 cfm |
| Best Sellers Rank | #27 in Computer Case Fans |
| Brand | be quiet! |
| Brand Name | be quiet! |
| Compatible Devices | Desktop |
| Cooling Method | Fan |
| Customer Reviews | 4.7 out of 5 stars 969 Reviews |
| Global Trade Identification Number | 04260052188866 |
| Item Dimensions L x W x H | 4.72"L x 0.98"W x 4.72"H |
| Item Weight | 310 g |
| Manufacturer | be quiet! |
| Material Type | Plastic |
| Maximum Rotational Speed | 2500 rpm |
| Model | BL094 |
| Noise Level | 31.2 db |
| Number of Items | 1 |
| Number of Packs | 40 |
| Part Number | BL094 |
| Power Connector Type | 4-Pin |
| Product Dimensions | 4.72"L x 0.98"W x 4.72"H |
| Set Name | PWM High-Speed |
| Unit Count | 1 Count |
| Voltage | 12 volts |
| Warranty Description | 1 year |
| Wattage | 2.4 watts |
A**N
One of the very best airflow fans on the market
I was looking to get the best low-noise but high performance fan for the single output of my case to balance with the 4 low-noise fans I had running for air intake. Originally I had Fractal Design Dynamic GP14 fan that came with the case but I swapped that to be an additional input when I upgraded to a higher powered Corsair ML140 Pro. With the Corsair fan performance was decent but I found it seemed to get a bit noisy at moderate speeds. Realistically, my cooling setup was always more than adequate, I didn't have any temperature issues whatsoever, but I am a bit of a nerd for good air cooling and just like upgrading something once in a while and it seemed like there was room for improvement here. I had the corsair for several years but I would occasionally do research on fans or watch the latest reviews and comparisons of fans on youtube. Eventually the time felt right that I felt like spending the money and that there were some good options to upgrade to. This fan has been a definite improvement capable of moving more air at lower sound levels. I also like that it has the headroom to push to even higher speeds than I need with my current setup just in case I ever feel like it or was trying to max my performance having fun overclocking and benchmarking. I didn't bother to do any recorded tests of my temps but my subjective experience has been that I am very happy with the performance as I created a fan curve for it that gives me what I want airflow wise and my computer remains quieter than it did before. I also stepped away from having my computer with so many LED lights so the transition to a fan without lights worked for me. A few months ago I made significant upgrades to my processor and my video card and this still handles everything I can throw at it with ease and quietness. I have been super happy with the performance of this fan and will definitely have them in mind next time I am building a system.
E**S
Exceptional Case Fan
I purchased the be quiet! Silent Wings 4 140mm PWM high-Speed fan to go in to the rear case position of my Fractal Define R5 case. Another review led me away from the Silent Wings Pro 4 as the user noted that it was loud at full speed and that it was optimized to go on to radiators which contributed to the extra cost of the fan. Upon receiving it I was shocked by the weight of this fan, nearly 11 ounces. Fit and finish appeared superb. Since I was only purchasing one fan, I was mostly price agnostic. I needed a rear case fan to use in combination with a Noctua NH-D15 cooler to help cool an Intel i9-13900K. It's plugged in to the CPU-OPT header on my MB which works well for my set-up since I don't game and don't put any stress on the GPU (CPU based video rendering.) The PC sits on my desk about 1.5 feet away from my ear. The PC is completely silent at idle with all the fans running at 30%. I get maximum cooling of the i9-13900K with the two Noctua heatsink fans plus the Silent Wings high speed set at 90% (about 1700 RPM for the be quiet! fan.) I get no throttling when working on my simple and short 4K videos and the sound level remains moderate even at 100% fan speeds for the 3 CPU fans. I have it mounted for silence which places the fan about 1 mm away from touching the case. This is how it arrives in the package. If you prefer, however, you can reverse the corner mounts and mount it touching the case for maximum air pressure. I'm using the 3rd party software FanControl to control all of my PC fans. I couldn't be more pleased with the performance of this fan.
A**R
Simply the best.
I usually don’t write reviews but wow i am genuinely impressed. These are pricey i am not going to lie but the quality and the performances in cfm you get in a fan thats this quiet is well then worth it, i had stock nzxt fans on my kraken elite and for what it was they did okay but i needed fans that push more air out and oh man do they do. In low idle i can feel the air blow through the radiator and my mesh upper portion of the case and this is just in low idle. I also want to put it out there that i run a 7700x and I’ve noticed that its been keeping my cpu temperature cooler by about 3-5 degrees.
O**S
Excelent
I installed a new Main Board in my 18 yo mid-tower size case. This fan is perfect and MUCH quieter than the original constant RPM fan it replaced.
P**A
Worth the upgrade
Quiet and powerful, so happy I upgrade it
J**T
Keeps 4000D Cool and Quiet
I have 6 of these in my Corsair 4000D, (4 case fans and a Silent Loop 3 240mm) and the case runs unbelievably cool and quiet even with a 5090 and 9800X3D. Obsessed with these BeQuiet fans.
P**.
Great Fans!
I have had zero issues with the two I placed in my custom build as exhaust fans and they are not very loud either.
N**O
Well-built fans, but definitely not silent if you're pushing your PC temps.
These are very effective fans, but they are louder than I thought they would be. They replaced some older no-name fans that were starting to make rattling sounds and needed to be replaced. On the one hand, they are actually a little louder than the old no-name fans, but on the other hand, they are keeping my PC cooler than it used to be. They move air very well. I'm glad that I bought them, but if you're looking for truly silent fans (if such a thing exists), these aren't it.
A**.
Parfait.
Installation simple et rapide. Malgré qu'il soit high speed, le silence est au rendez-vous en idle, commence à se faire légèrement entendre lorsque le CPU monte à 50°.
O**N
Good product and right up there with Nochua
These are quiet compared to my ten year old but unused 120mm Corsair fans. the tighter tolerances of the fan blades to the shroud move plenty of air at slower speeds. The black is more matte than most black fans and the connection cord is better integrated than other fans Ihave bought in the past.
白**濁
静か…でもしっかり機能してる。
RAVEN RV03というPCケースのTOP排気、リア吸気の120mmファンとして購入。 本当に静か…高負荷かでもそんなに五月蠅くなく、通常時はほぼ無音と感じる。 でもしっかりと機能しています。
J**L
Parfait
Silencieuse et performante j'adore
A**Z
Una bestia
Muy poco ruido y los tengo sacando aire, a 1000 vueltas yo se oyen nada. Calidad de construcción BeQuiet.
Trustpilot
2 weeks ago
2 weeks ago