---
product_id: 460158976
title: "Silent Wings Pro 4 140mm PWM High Speed 2400 RPM Premium Low Noise Cooling Fan | 4-Pin | BL099"
brand: "be quiet!"
price: "A$75"
currency: AUD
in_stock: true
reviews_count: 11
category: "Be Quiet!"
url: https://www.desertcart.com.au/products/460158976-silent-wings-pro-4-140mm-pwm-high-speed-2400-rpm
store_origin: AU
region: Australia
---

# 36.8 dB ultra-quiet noise 2400 RPM max speed 97.4 CFM airflow Silent Wings Pro 4 140mm PWM High Speed 2400 RPM Premium Low Noise Cooling Fan | 4-Pin | BL099

**Brand:** be quiet!
**Price:** A$75
**Availability:** ✅ In Stock

## Summary

> 🖤 Silent power that keeps your rig cool and your vibe cooler.

## Quick Answers

- **What is this?** Silent Wings Pro 4 140mm PWM High Speed 2400 RPM Premium Low Noise Cooling Fan | 4-Pin | BL099 by be quiet!
- **How much does it cost?** A$75 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.com.au](https://www.desertcart.com.au/products/460158976-silent-wings-pro-4-140mm-pwm-high-speed-2400-rpm)

## Best For

- be quiet! enthusiasts

## Why This Product

- Trusted be quiet! brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Adaptive speed control:** Switch effortlessly between medium, high, and ultra-high PWM speeds up to 2400 RPM to match your system’s demands.
- • **Pressure-perfect design:** Funnel-shaped air outlet and minimal tip clearance generate extremely high static pressure for efficient heat dissipation.
- • **Whisper-quiet operation:** Virtually inaudible at regular speeds, ensuring your workspace stays distraction-free and focused.
- • **Vibration-free longevity:** 6-pole motor with fluid-dynamic bearing minimizes vibration and noise, extending fan lifespan and smoothness.
- • **Precision airflow mastery:** Optimized fan blades deliver peak performance on radiators and heat sinks for superior cooling.

## Overview

The be quiet! Silent Wings Pro 4 140mm PWM fan combines high airflow (97.4 CFM) and ultra-quiet operation (36.8 dB) with a max speed of 2400 RPM. Its advanced blade design and funnel-shaped frame optimize static pressure, making it ideal for radiators and heat sinks. Featuring a 6-pole motor and fluid-dynamic bearing, it ensures minimal vibration and long-lasting smooth performance, perfect for professional-grade silent PC builds.

## Description

Buy be quiet! Silent Wings Pro 4 140mm PWM High Speed 2400 RPM Premium Low Noise Cooling Fan | 4-Pin | BL099: Games - desertcart.com ✓ FREE DELIVERY possible on eligible purchases

Review: 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.
Review: 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.

## Features

- Optimized fan blades for the highest performance on radiators and heat sinks
- Speed switch allows changing maximum PWM speed between medium-speed, high-speed and ultra-high-speed (up to 2400 rpm)
- Small tip clearance and a fan frame with a funnel-shaped air outlet for extremely high air pressure
- Virtually inaudible operation at regular speed
- 6-pole fan motor and fluid-dynamic bearing for less vibration and very smooth operations

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0B74CP6X2 |
| Air Flow Capacity | 97.4 Cubic Feet Per Minute |
| Best Sellers Rank | #21 in Computer Case Fans |
| Brand | be quiet! |
| Compatible Devices | Radiator |
| Computer Memory Type | DIMM |
| Cooling Method | Fan |
| Customer Reviews | 4.7 4.7 out of 5 stars (2,305) |
| Date First Available | July 21, 2022 |
| Global Trade Identification Number | 04260052188910 |
| Item Dimensions LxWxH | 5.51 x 0.98 x 5.51 inches |
| Item Weight | 10.9 ounces |
| Item model number | BL099 |
| Manufacturer | be quiet! |
| Material | Copper |
| Maximum Rotational Speed | 2400 RPM |
| Noise Level | 36.8 Decibels |
| Number of Items | 1 |
| Power Connector Type | 4-Pin |
| Product Dimensions | 5.51"L x 0.98"W x 5.51"H |
| Series | BL099 |
| Voltage | 12 Volts |
| Wattage | 3.04 watts |

## Product Details

- **Brand:** be quiet!
- **Compatible Devices:** Radiator
- **Cooling Method:** Fan
- **Material:** Copper
- **Maximum Rotational Speed:** 2400 RPM
- **Noise Level:** 36.8 Decibels
- **Power Connector Type:** 4-Pin
- **Product Dimensions:** 5.51"L x 0.98"W x 5.51"H
- **Voltage:** 12 Volts
- **Wattage:** 3.04 watts

## Images

![Silent Wings Pro 4 140mm PWM High Speed 2400 RPM Premium Low Noise Cooling Fan | 4-Pin | BL099 - Image 1](https://m.media-amazon.com/images/I/71oTv6qUmKL.jpg)

## Available Options

This product comes in different **Size, Style** options.

## Customer Reviews

### ⭐⭐⭐⭐⭐ One of the very best airflow fans on the market
*by A***N on November 13, 2024*

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.

### ⭐⭐⭐⭐⭐ Best 140mm silent fans on the market
*by M***H on October 1, 2025*

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.

### ⭐⭐⭐⭐⭐ Seems to function well when intact on arrival
*by J***M on December 10, 2025*

Revising from 1-star to 5-star. Replacements that arrived intact include high-quality sleeved cables and exchangeable corners to fit different use scenarios. I replaced 4 of my 120mm case fans with these and added another to my Scythe Tuna 2 CPU cooler. These are almost completely inaudible at default settings. But, they can run as high as 3000 rpm if you set a switch on the rear to ultra-high-speed. Though, it is advisable to set them to PWM mode in BIOS or a third party utility like Fan Control and then set a fan curve. That allows the fans to run very quietly at lower hardware temps and ramp up speeds at user-defined temps. This is especially helpful when using PBO or manually overclocking.

## Frequently Bought Together

- be quiet! Silent Wings Pro 4 140mm PWM High Speed 2400 RPM Premium Low Noise Cooling Fan | 4-Pin | BL099
- be quiet! Silent Wings 4 Cooling Fan | 120mm PWM high-Speed | White | BL115

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*Product available on Desertcart Australia*
*Store origin: AU*
*Last updated: 2026-02-20*