Be quiet! Silent Wings Pro 4 140mm PWM Fan
The fan blades are what make a fan. For this reason, the fan blades of the Silent Wings Pro 4 140mm PWM have been optimally developed from the ground up. The blade arrangement enables unsurpassed performance in all kinds of applications. Be it in a case, on radiators or heat sinks. Silent Wings Pro 4 140mm PWM provides exceptional air pressure, significantly increasing system performance. The reduced distance between the fan blades and the frame enables an exceptionally high air pressure. As a result, the Silent Wings Pro 4 140mm PWM allows the user to run even the most demanding applications.
The fan blades are what make a fan. For this reason, the fan blades of the Silent Wings Pro 4 140mm PWM have been optimally developed from the ground up. The blade arrangement enables unsurpassed performance in all kinds of applications. Be it in a case, on radiators or heat sinks. Silent Wings Pro 4 140mm PWM provides exceptional air pressure, significantly increasing system performance. The reduced distance between the fan blades and the frame enables an exceptionally high air pressure. As a result, the Silent Wings Pro 4 140mm PWM allows the user to run even the most demanding applications.
The fan blades are what make a fan. For this reason, the fan blades of the Silent Wings Pro 4 140mm PWM have been optimally developed from the ground up. The blade arrangement enables unsurpassed performance in all kinds of applications. Be it in a case, on radiators or heat sinks. Silent Wings Pro 4 140mm PWM provides exceptional air pressure, significantly increasing system performance. The reduced distance between the fan blades and the frame enables an exceptionally high air pressure. As a result, the Silent Wings Pro 4 140mm PWM allows the user to run even the most demanding applications.
The fan blades are what make a fan. For this reason, the fan blades of the Silent Wings Pro 4 140mm PWM have been optimally developed from the ground up. The blade arrangement enables unsurpassed performance in all kinds of applications. Be it in a case, on radiators or heat sinks. Silent Wings Pro 4 140mm PWM provides exceptional air pressure, significantly increasing system performance. The reduced distance between the fan blades and the frame enables an exceptionally high air pressure. As a result, the Silent Wings Pro 4 140mm PWM allows the user to run even the most demanding applications.
in 10 offers
The lowest price for Be quiet! Silent Wings Pro 4 140mm PWM Fan right now is $39.00 at Umart, compared across 10 retailers.
The all-time low was $24.51 on 16 July 2025 — today's price is 59% above the lowest ever. It has been notably cheaper before — worth setting a price alert.
Prices last updated 28 July 2026.
Last updated at 28/07/2026 03:35:45
be quiet Silent Wings Pro 4 PWM 140mm Fan BL099 - 140mm Case Fans
Delivery $12.55
Be Quiet! Silent Wings Pro 4 PWM 140mm Fan
Delivery between Wed – Fri $15
Be Quiet! Silent Wings Pro 4 PWM 140mm Fan
Delivery between 30 July – 7 Aug $10
Be quiet! Silent Wings Pro 4 PWM 140mm Fan (BL099)
Delivery $21
be quiet Silent Wings PRO 4 Black 140mm PWM Noise Level 36.8 dBA Max, Airflow Upto 97.4 CFM
7-day returns
be quiet! Silent Wings Pro 4 PWM 140mm Fan (BL099)
Delivery $14
be quiet! SILENT WINGS PRO 4 PWM 140mm Fan
30-day returns
be quiet! SILENT WINGS PRO 4 140mm Performance PWM Fan (Black)
Delivery between 30 July – 10 Aug $11.64
be quiet! SILENT WINGS PRO 4 | 140mm PWM Computer case Fan 14 cm Black 1 pc(s)
Free delivery
Silent Wings Pro 4 140mm PWM High Speed 2400 RPM Premium Low Noise Cooling Fan | 4-Pin | BL099
Delivery between 3–6 Aug $29
originally posted on cclonline.com
This is the quietest fan i've ever used. My system even under load is so quiet that I had to check they were working after installing them. I do think there expensive for what they are. After all its just a fan. When compared to other fans though it is a reasonable price.
originally posted on grosbill.com
5/5
originally posted on cclonline.com
Expensive for a case-fan, but quality and performance are excellent.
| Cable length | 0.5 m |
| Maximum current | 0.5 A |
| Power consumption (typical) | 6 W |
| Rated current | 0.5 A |
| Rated voltage | 12 V |
be quiet Silent Wings Pro 4 PWM 140mm Fan BL099 - 140mm Case Fans
Delivery $12.55
Be Quiet! Silent Wings Pro 4 PWM 140mm Fan
Delivery between Wed – Fri $15
Be Quiet! Silent Wings Pro 4 PWM 140mm Fan
Delivery between 30 July – 7 Aug $10
Be quiet! Silent Wings Pro 4 PWM 140mm Fan (BL099)
Delivery $21
be quiet Silent Wings PRO 4 Black 140mm PWM Noise Level 36.8 dBA Max, Airflow Upto 97.4 CFM
7-day returns
This is the quietest fan i've ever used. My system even under load is so quiet that I had to check they were working after installing them. I do think there expensive for what they are. After all its just a fan. When compared to other fans though it is a reasonable price.
5/5
Expensive for a case-fan, but quality and performance are excellent.
3 speeds configurable by a switch, quite silent and very powerful, the real only inconvenient is the price.
Excellent product for big cases. Great quality, speed and volume of air. Possibly best product in this category.
Awesome speed and control. Virtually inaudible under normal load. Did I mention they look great in my all black build. Only downside, and it's a small one, is the white lettering on the back side of the fans. Nothing a black sticker couldn't fix.
Works fine. Sound level is acceptable to about ~1200 rpm, but above that it is not possible to sit at the PC because of the loud fan noise.
| Cable length | 0.5 m |
| Maximum current | 0.5 A |
| Power consumption (typical) | 6 W |
| Rated current | 0.5 A |
| Rated voltage | 12 V |
