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.
Last updated at 06/10/2026 14:01:52
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 Fri – Tue $15
Be Quiet! Silent Wings Pro 4 PWM 140mm Fan
Delivery between 15–25 June $10
Be quiet! Silent Wings Pro 4 PWM 140mm Fan (BL099)
Delivery $21
be quiet! SILENT WINGS PRO 4 140mm Performance PWM Fan (Black)
Delivery between 12–23 June $11.64
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 Fri – Tue $15
Be Quiet! Silent Wings Pro 4 PWM 140mm Fan
Delivery between 15–25 June $10
Be quiet! Silent Wings Pro 4 PWM 140mm Fan (BL099)
Delivery $21
be quiet! SILENT WINGS PRO 4 140mm Performance PWM Fan (Black)
Delivery between 12–23 June $11.64
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 |
