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💨 Silent wings, powerful breeze — cool your rig without the noise!
The be quiet! Silent Wings Pro 4 120mm PWM fan combines cutting-edge blade design and a 6-pole motor to deliver up to 83.9 CFM airflow at a whisper-quiet 36.9 dB noise level. With adjustable speeds up to 3000 RPM and a funnel-shaped frame for high air pressure, it’s engineered for premium cooling performance on radiators and heat sinks. Its sleek black finish and long cables make it a top choice for professional-grade, silent PC builds.












| ASIN | B0B746VB2F |
| Air Flow Capacity | 83.9 cfm |
| Best Sellers Rank | #22 in Computer Case Fans |
| Brand | be quiet! |
| Brand Name | be quiet! |
| Compatible Devices | Desktop, Laptop, Server, Graphic Cards, Electronic Enclosures, Other Cooling Systems |
| Cooling Method | Fan |
| Customer Reviews | 4.6 out of 5 stars 1,179 Reviews |
| Global Trade Identification Number | 04260052188903 |
| Included Components | be quiet! Fan BL098 Silent Wings Pro 4 120mm PWM Black Retail |
| Item Dimensions L x W x H | 4.72"L x 4.13"W x 4.72"H |
| Item Weight | 310 g |
| Manufacturer | be quiet! |
| Material Type | Copper |
| Maximum Rotational Speed | 3000 rpm |
| Model | BL098 |
| Noise Level | 36.9 db |
| Number of Items | 1 |
| Number of Packs | 1 |
| Part Number | BL098 |
| Power Connector Type | 4-Pin |
| Product Dimensions | 4.72"L x 4.13"W x 4.72"H |
| Set Name | PWM Pro Version |
| UPC | 827676014038 735280754014 |
| Unit Count | 1 Count |
| Voltage | 12 volts |
| Warranty Description | 1 year |
| Wattage | 3 watts |
E**H
Honest thoughts after installing them and using them for over a year.
The fans are very quiet, they let an amazing amount of air flow even with them switched onto the quiet mode. The installation could be better as I replaced 6 fans with these and the 120mm model and screwing in 24 screws with the ones they provide was not fun at all. They all hooked up and worked perfectly on first boot, didn't have any cable length issues as they were all long enough for my ATX size build. Overall it's a good product I would recommend.
M**H
Best 140mm silent fans on the market
I’ve tried a lot of high-end fans from Noctua, Phanteks, Lian Li, Arctic, etc, and I was really surprised with how good the SWP 4’s are. In some ways IMO they are one of the best 140mm fans on the market, if not thee best. Let me explain why. In terms of brands the two best fans I’ve ever used are the Noctua NF-A12 G2’S and the Phanteks T30. Like the SWP 4’s they both strike the perfect balance between high airflow and silent operation. HOWEVER, the reason why I ended up going with the SWP 4’s is because (1) the Noctua G2’s only come in their distinctive yet fugly brown color, and (2) Phanteks still hasn’t released a 140mm version of the T30. So essentially, if you need black 140mm fans that are both high performing and silent, the SWP 4’s are currently the best option on the market today. They’re also a very attractive fan with high quality cabling so if you’re into aesthetic building like I am they look great on a radiator. In terms of how quiet they are, I have them in my SFF PC which sits directly on my work desk and while idle my PC is completely silent. But even at higher RPM my PC sounds similar to an air purifier - no vibrations, motor sounds, droning, etc, just a pleasant and subtle rush of air akin to white noise. Overall I definitely recommend these fans especially if you need 140mm.
R**.
Silent Wings are exactly that
Be Quiet! has become one of the best fan companies for PC building, they may be a bit more expensive but the quality and air flow they provide is top notch. I personally purchased 4 of these for my gaming PC, and it made a huge difference in temps compared to the stock fans on my Fractal Torrent case. They run at a good speed of up to 2400 rpm and make a lot less noise compared to the stock fans I had. The airflow in my case is great with these fans installed on both the exhaust, and bottom intake. Will be my go-to fan company for years to come if the quality and performance stays top notch. Thanks again Be Quiet!
D**S
Beastly Cooling Power In a Standard Size
This is a review of the Pro 4 120mm model specifically. I think of this as a Noctua A12x25 with extra headroom. Up to the Noctua's limit, the BeQuiet! is roughly comparable (within 1CFM and 1dBA through a radiator with the Noctua slightly better up to its limit). The difference is, if you need more, this fan will give it to you, but at the cost of noise. Up to 1,000 RPM, it's barely audible, but it *will* get loud, especially beyond 2000 RPM. At top speed, it sounds almost like an angry server fan (the pitch is not as shrill), but provides an absolute mountain of airflow. If the Noctua A12x25 went up to 3,000 RPM, it would probably outperform this fan slightly, and while the Noctua PPC-3000 does go up to 3,000 RPM, it does not move as much air as the A12x25 at similar speeds. The Phanteks T30 comes closest to this in raw performance up to its limit, but is again, limited to 2,000 RPM, allowing the SW Pro 4 to just brute force its way to more airflow. [CORRECTION: The T30 does go up to 3,000RPM and does outperform this fan at that speed. The T30 also has more static pressure, but is significantly louder and 5mm thicker, which may lead to fitment/clearance issues.] If you know you will never run these fans over 2,000 RPM (or even less) I would recommend the Noctua A12x25s as they will perform slightly better in terms of noise and airflow up to that point. If you are just looking for maximum airflow, this is the best you are going to get (yes, even compared to the Phanteks T30).
A**R
THIS IS A QUALITY PRODUCT!!!
THIS IS A QUALITY PRODUCT!!! I used it in a 2-pin configuration as a gas absorption RV refrigeration air circulation fan. I cut the four pin low voltage plug off. The wires are not color coded so it took a bit of sorting out to find the pos/ground wires. The fan is very quiet and for my application the three speeds is nice because of seasonal requirements. I’ve no longevity feedback but suspect it to be durable based upon the quality of the design. The rubber corner mounting points dampen vibration. High speed in summer and medium, low or off in fall, winter and spring.
M**E
Perfect choice for Fractal Torrent Nano case
Excellent choice, perfect accessory for my Fractal Torrent Nano case. I didn't know how much I needed an exhaust fan until I got this thing. My setup runs cool thanks to this specific exhaust fan due to how fast it can pull hot air from inside the case.
B**S
Quiet 🤫 and Cooling ❄️
Dropped my CPU & GPU temps by ~5c!! With very little noise in a Matx case! Cable is length is plenty and it’s braided for easy management and installation. Easy to mount and include a variety of accessories. No RGB & They’re on the pricey side but will be ordering the rest of them slowly.
A**R
⭐⭐⭐⭐⭐ King of 140mm Fans - be quiet! Silent Wings Pro 4
After extensive research, I can confidently say the be quiet! Silent Wings Pro 4 140mm fan is a top contender in its size class. I scoured the market looking for the best balance of performance and noise levels, and this fan consistently came out on top. The only real competition I found was the Noctua NF-A14, but that's a significantly older model that hasn't seen revisions in quite some time. While the NF-A14 is a strong performer, the Silent Wings Pro 4 offers more modern features and refinements. My advice to anyone considering a 140mm fan: definitely check if Noctua has released a new revision of the NF-A14 (similar to their updated NF-A12). If they have, compare the two. However, as of right now, the be quiet! Silent Wings Pro 4 is the clear winner in the 140mm category. It delivers exceptional performance with minimal noise, making it the perfect choice for demanding builds where airflow and acoustics are equally important. Don't waste your time searching – if you need a 140mm fan, this is the one to get.
T**S
Ottime
Silenziosissime e molto performanti
R**N
Great quality
Exchanged my stock EK Nucleus AIO fans. Didn't do much for the temps or noise in my original push config in a Meshlicious case. Switched to a pull config (fans outside the case, and the temps and noise is amazing now! Next time I will test Noctua instead tho.
A**A
Silenzio e prestazioni
Dopo aver provato le be quiet! Silent Wings Pro 4 140mm nella stessa build e averne apprezzato la qualità, ho deciso di acquistare anche queste da 120mm, per montarle sull’AIO. Uso il mio PC esclusivamente per il gaming, e cercavo delle ventole che non solo fossero silenziose, ma che fossero anche in grado di gestire le alte temperature che arrivano quando spingo il sistema al limite. Be quiet! mi ha sempre impressionato, e con queste ventole non sono rimasto deluso. 🔇 Silenziosità La prima cosa che mi viene in mente quando penso a queste ventole è quanto siano silenziose, e questo è stato uno dei motivi principali per cui le ho scelte. Sì, è vero che girano fino a 3000 rpm, e a quella velocità si cominciano a sentire, ma il rumore che producono non è mai fastidioso. È un rumore “da ventola”, che ti fa capire che stanno lavorando, ma non disturba in nessun modo, nemmeno nelle sessioni più lunghe di gaming. Per me, che gioco spesso per ore, la tranquillità di non sentire un rumore fastidioso è fondamentale. E anche quando gioco con la musica in sottofondo, nemmeno me ne accorgo. 🌬 Prestazioni di Raffreddamento Quello che mi ha veramente colpito è che, nonostante la silenziosità, queste ventole fanno il loro lavoro alla grande. Il mio sistema non si surriscalda mai, nemmeno quando spingo il PC durante le sessioni di gioco più intense. Ho provato a stressarlo un po’, e posso dire che il raffreddamento è stato impeccabile. Le temperature sono sempre rimaste basse, e questo mi dà una grande tranquillità. Non devo più preoccuparmi del calore che può accumularsi durante le maratone di gaming. 🛠 Costruzione e Qualità A livello di costruzione, queste ventole sono proprio come me le aspettavo: solide, ben fatte, con una qualità che si sente appena le prendi in mano. Ho sempre avuto una certa fiducia nel marchio Be quiet!, e ogni volta che compro qualcosa di loro, è come se non potessero deludermi. Le ventole si montano facilmente e sono molto silenziose, anche durante il montaggio. La sensazione di qualità si percepisce subito, e mi fa pensare che, anche dopo mesi o anni di utilizzo, non avranno mai problemi. ⚡ Efficienza Energetica Un altro aspetto che mi ha convinto è l’efficienza energetica. So che a 3000 rpm le ventole lavorano al massimo, ma nonostante la potenza, il consumo energetico è contenuto. Questo mi ha fatto riflettere sul fatto che, pur avendo un sistema potente e performante, riesco comunque a mantenere un buon bilanciamento con il consumo di energia. Non è una cosa che capita sempre con ventole così potenti. 🔧 Compatibilità Essendo parte della stessa build delle 140mm, queste ventole si sono integrate perfettamente nel mio sistema. Non ho avuto alcun tipo di problema durante l’installazione, e tutto è andato liscio come l’olio. È stato bello vedere il sistema diventare più coerente con ventole della stessa serie, ma di dimensioni diverse. Si sono adattate perfettamente al mio AIO, senza dover fare alcun aggiustamento. 🕰 Longevità Essendo le 140mm che ho già montato nella mia build ancora in perfetta forma, sono abbastanza sicuro che queste 120mm non mi daranno problemi nel lungo periodo. Il materiale è di qualità, e tutto sembra fatto per durare. Non vedo l’ora di vedere come si comporteranno nel tempo, ma sono piuttosto tranquillo a riguardo. 💰 Rapporto Qualità-Prezzo Ok, non sono le ventole più economiche che troverai, ma sinceramente, il prezzo è giustificato dalla qualità. Per come sono costruite, per quanto sono silenziose e per le prestazioni che offrono, non mi dispiace affatto l’investimento. Quando si tratta di raffreddamento, preferisco spendere un po’ di più, sapendo che avrò un prodotto che durerà a lungo e che farà il suo lavoro in modo impeccabile. Conclusioni Le be quiet! Silent Wings Pro 4 120mm sono davvero una scelta azzeccata per chi cerca prestazioni elevate senza compromettere la silenziosità. Dopo aver provato le 140mm, non avevo dubbi che queste 120mm non mi avrebbero deluso, e posso confermare che è così. Il mio PC è sempre fresco e silenzioso, anche nelle situazioni più stressanti. Se come me usi il PC per il gaming e non vuoi sentire rumori fastidiosi, queste ventole sono quello che ti serve. Consigliatissime!
G**A
silence ...
Aucun bruit, comme pour tous les be quiet. Il tourne 24h/24 depuis 1 an, aucun signe de faiblesse, aucun bruit. Très joli en blanc :-)
K**N
Good airflow
This is a good quality pc fan, it’s quiet and keeping nice and cool compared to my old. Airflow is good and it has a switch for the max speed what I set to the fastest and the noise level is still good. Thought the price was a bit high at first but glad I purchased this fan once fitted
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