---
product_id: 73699741
title: "Bgears b-Blaster 140x38 (PWM Version) Extreme Cooling Gaming PC & Mining Machine Fan, Hi-Speed 5200RPM w/Airflow of 308 CFM, 2 Ball Bearing Designed for Extended Life & high Performance, 4 Wire Black"
brand: "bluegears"
price: "€ 71.46"
currency: EUR
in_stock: true
reviews_count: 13
category: "Bluegears"
url: https://www.desertcart.be/products/73699741-bgears-b-blaster-140x38-pwm-version-extreme-cooling-gaming-pc
store_origin: BE
region: Belgium
---

# 5200 RPM extreme speed 308 CFM powerful airflow 2 ball bearing for durability Bgears b-Blaster 140x38 (PWM Version) Extreme Cooling Gaming PC & Mining Machine Fan, Hi-Speed 5200RPM w/Airflow of 308 CFM, 2 Ball Bearing Designed for Extended Life & high Performance, 4 Wire Black

**Brand:** bluegears
**Price:** € 71.46
**Availability:** ✅ In Stock

## Summary

> 🔥 Blast past overheating with the b-Blaster 140x38 — where power meets endurance!

## Quick Answers

- **What is this?** Bgears b-Blaster 140x38 (PWM Version) Extreme Cooling Gaming PC & Mining Machine Fan, Hi-Speed 5200RPM w/Airflow of 308 CFM, 2 Ball Bearing Designed for Extended Life & high Performance, 4 Wire Black by bluegears
- **How much does it cost?** € 71.46 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.be](https://www.desertcart.be/products/73699741-bgears-b-blaster-140x38-pwm-version-extreme-cooling-gaming-pc)

## Best For

- bluegears enthusiasts

## Why This Product

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

## Key Features

- • **308 CFM Airflow Surge:** Maximize heat dissipation with industry-leading airflow volume.
- • **PWM Precision Control:** Seamlessly adjust fan speed for tailored cooling and efficiency.
- • **Certified Safe & Reliable:** UL, CE, FCC, RoHS, and REACH certified for peace of mind.
- • **Blazing 5200 RPM Turbo Spin:** Unleash extreme cooling power that outpaces the competition.
- • **Dual Ball Bearing Durability:** Engineered for longevity and consistent high performance.

## Overview

The Bgears b-Blaster 140x38 PWM fan delivers extreme cooling with a high-speed 5200 RPM motor and an impressive 308 CFM airflow. Designed with Japanese dual ball bearings, it ensures extended life and reliable performance under heavy-duty conditions. Featuring a 4-wire PWM connector for precise speed control and backed by multiple global safety certifications, this fan is the ultimate choice for gamers, miners, and professionals demanding top-tier thermal management.

## Description

Bgears b-Blaster 140 x 38 mm Black 2 ball bearing high speed high performance fan. Extreme Speed at 5200 RPM with Excellent Airflow of up to 308 CFM. 38mm thickness Frame design for large motor to generate ultimate speed and airflow. Mini 3 pin 3 wires connector with fan speed signal output. Include 4 mounting screws.

Review: Bgears Blasts one out of the park with these Fan-tastic Air-Movers! - I have been researching, planning, and buying parts for my new "My Ultimate Machine" since January of this year, about 8 months ago (bought first round of parts at the end of May). I am a student in a field that deals with a well-above-average amount of physics, and I have been involved in modifying and racing/tracking BMW's (autocross and road course) for about 7 years now, which has taught me an IMMENSE amount about cooling systems, efficiency, proper design, and so forth. Anyway, I decided at the last minute to switch from a 3770K + Z77 board (tired of waiting for Maximus V Extreme) to the much more powerful, overclock-friendly 3930K and Rampage IV Extreme X79. This did, however, necessitate finding a different case as the budget for these two parts went up by $400 and thus the CaseLabs TH10 would have to wait. I found the NZXT Switch 810, and fell in love. A big part of this build is the water cooling system (custom, not the sealed unit "liquid coolers" that are nothing more than "high end" air coolers). After seeing the GTX670's performance, I was able to save 25% compared to buying a GTX680 while retaining 93-98% of the 680's performance, and with the EVGA GTX670 FTW I am able to use full-coverage 680 blocks, important to me personally. I did tons of reading on liquid cooling, and even with my background it was pretty much all new to me (cooling a 200F+ car is much different than cooling a computer). I decided that I had to take advantage of the space offered by the Switch 810, which I got in white and is an absolutely incredible computer case BTW. That meant using one of the 3x140 (aka 420) rads up top instead of the far-more-common 3x120 (360) models, as the extra surface area of 3 140mm fans compared to 120mm fans is significant; in fact, a 3x140mm radiator actually has about 5,400sq-mm more surface area than a 4x120mm radiator! The problem was, there was no way I could fit a 60mm thick rad in there with push-pull fans due to the 8+4pin EPS (CPU Power) connections, the VRM/MOSFET heatsink, etc. That meant instead of going with a thick radiator with a medium-low fin count of 9-12 fins per inch, I would need to find a thinner radiator that somehow was able to compete with the thicker models. Typically, how they manage this is by increasing the fin density to around 20fpi but a couple have an insane 30fpi, requiring a tornado of a fan (think 3800-5400rpm 120x38mm industrial fans) setup to reach their potential. As I do not wish to sit next to a VTOL Case, I did some more digging... I found the XSPC EX420 radiator, only 36.5mm thick, and was designed specifically to provide a thin radiator with performance that meets or exceeds thicker radiators at most fan speeds, although below 1000-1200rpm the thicker rads tend to perform a bit better. The reason this rad performs so well is that while it uses a moderate-high fin density of 19fpi, it is unique in that measuring the fins linearly does not provide the whole picture at all... Unlike any other rad that I have ever seen, the EX-series use split-fins, so in the same space that any other rad would have 19 fins, the EX has 38; yet because the way they did this was to add twice as many rows of fins rather than twice as many fins per row, the EX is absolutely the best-scaling radiator I have used in terms of performance:fan speed. Once you get above 1500rpm, the EX pulls away from the pack, and at this point is outperforming almost all thick rads (Alphacool NeXXos UT60 is an exception, as it is tied with the EX for best-radiator IMHO). This performance continues to scale linearly to 3,000rpm and likely well-beyond, although it has not been tested at speeds higher. Also, I got an Alphacool NeXXos UT60 240 (2x120) all-copper radiator for the bottom of the case, which has 4x 120x25mm Koolance 2800rpm fans in push pull. So, after deciding on the radiator (EX420), I had to find some fans that would be able to eek as much performance as possible out of it, as 140mm fans are generally designed to move significant air (~55-75cfm) but do so as quietly as possible; thus, most 140 fans are ~900-1400rpm in speed. Another issue is static pressure, as a strong 120x25mm fan (such as the aforementioned Koolance ones) can push 5.4mmHg pressure, although that is actually extraordinarily high with most "performance fans" being somewhere between 2.2 and 3.7mmHg (120x38mm fans increase static pressure around 40-70% over their 25mm-thick brethren, assuming they are otherwise equivalent). Also, I was faced with the issue of finding a fan that operated, and was reliable, while operating in a position blowing air "upward"; this is a position that sleeve-bearing fans, rifle-bearing fans, Hydrodynamic Bearing fans, and the like all face. THEN I FOUND THE BGEARS BLASTERS 140MM FANS!!!! I am NOT exaggerating when I say that these are by far the most powerful 140mm fans I have ever used (excluding the $75-200 server-grade 140x25/38mm fans). PROS: + Absolutely the best price:performance ratio I've seen in a LONG TIME!!! Why pay $20-30 for an inferior fan??? + 103 cubic-feet-per-minute of airflow is accurate, and this fan blows significantly more air than any other 140mm fan out there, although the Akasa Viper does come close + 3.5mmHg Static Pressure is the ABSOLUTE HIGHEST for a consumer 140mm fan, period! If you are using 140mm radiators or heatsinks, these are ideal + Dual-Ball-Bearing Motor means it functions perfectly in any position, including horizontal mounting + Used in a push-pull setup on an EX420, they drop the DeltaT of the loop from 6.2C to 4.3C compared to push-pull Cougar fans + Used in just a "push" setup on the same radiator, they still maintain a better delta t than any setup of Cougar, Noctua, Scythe, Noiseblocker fans + Incredibly quiet at 80% fan speed, only becomes "loud" above 80-85% but even then, they aren't obnoxiously loud or anything like that, you will simply know they are there + BALL BEARINGS + THE BEST 140mm fan you can get for use on ANY 140 rad!!! CONS: - NOT FOR SILENT PC USERS - You really should get a fan controller - Some people have had noise issues - It doesn't make me a sandwich :( Seriously, though, there aren't really any negatives if you know what you're doing. Use a rubber gasket or 7mm Phobya rubber shroud between the fan and rad/case, use rubber washers on the screw to decouple the fan, and USE A FAN CONTROLLER! If I have to tell you these things, you probably aren't ideal for a liquid cooling system... 10/10 stars!!!
Review: My need is different. This was perfect for me. - I am not using it as a computer fan. I needed a small high flow 12v fan to use on my off road motorcycle. I don't use the RPM control but on full flow it moves a ton of air but is loud at an annoying pitch. Can't hear it under the helmet or the running bike so don't care. If you need a lot of flow and don't care bout sound, this is your fan.

## Features

- 12 VDC Extreme Speed at 5200RPM with Excellent Airflow at 308 CFM
- Japanese 2 Ball Bearing fan for Extended Life and High Performance
- 4 pin 4 lead wire connector PWM with Fan Speed signal output
- 4 Screws included
- Now available in 40, 50, 60 70, 80, 90, 90x38, 120, 120x38 and 140mm
- UL, CE, FCC, RoHS, Reach Certified PWM Fan
- Important Note: If Noise Level is a more crucial issue than Extreme Cooling for your application, then this Fan is not suitable for your application. b-Blaster series and b-BlasterPWM series are designed for applications that require Intensive Cooling, heavy duty, and high performance. To achieve these requirements, it will require faster fan speed and a special fan motor and overall design. Please take note: Higher Speed (RPM) = Higher Airflow for Cooling (CFM) = Higher Noise Level (dBA).
- Why Certifications are needed: Bluegears Inc believes all these certifications are necessary so that our products will perform safely and at the highest level for your applications. Therefore, all b-Blaster series and b-BlasterPWM series fans went through intensive lab tests and are certified by all the top test labs in the world to ensure the product quality, safety, perform at the highest level, and the materials are human and environmentally safe. UL, FCC, CE, RoHS, and REACH Certified.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B07FHM5DJZ |
| Air Flow Capacity | 308 cfm |
| Best Sellers Rank | #510 in Computer Case Fans |
| Brand | Bluegears |
| Brand Name | Bluegears |
| Compatible Devices | Desktop |
| Cooling Method | Fan |
| Customer Reviews | 4.3 out of 5 stars 588 Reviews |
| Global Trade Identification Number | 00853704001831 |
| Included Components | Fan and screws |
| Item Dimensions L x W x H | 5.51"L x 3.54"W x 1.5"H |
| Item Type Name | b-Blaster 140x38 |
| Item Weight | 16 ounces |
| Manufacturer | Aerocool -- Dropship |
| Material Type | Lead |
| Maximum Rotational Speed | 5200 rpm |
| Model | b-Blaster 140x38 |
| Noise Level | 70 db |
| Number of Items | 1 |
| Number of Packs | 1 |
| Part Number | b-Blaster 140x38 |
| Power Connector Type | 3 pin,4 pin |
| Product Dimensions | 5.51"L x 3.54"W x 1.5"H |
| UPC | 853704001831 |
| Unit Count | 1 Count |
| Voltage | 12 volts_of_direct_current |
| Warranty Description | 1 year part and labor |
| Wattage | 33 |

## Product Details

- **Brand:** Bluegears
- **Compatible Devices:** Desktop
- **Cooling Method:** Fan
- **Material:** Lead
- **Maximum Rotational Speed:** 5200 RPM
- **Noise Level:** 70 Decibels
- **Power Connector Type:** 3 pin,4 pin
- **Product Dimensions:** 5.51"L x 3.54"W x 1.5"H
- **Voltage:** 12 Volts (DC)
- **Wattage:** 33

## Images

![Bgears b-Blaster 140x38 (PWM Version) Extreme Cooling Gaming PC & Mining Machine Fan, Hi-Speed 5200RPM w/Airflow of 308 CFM, 2 Ball Bearing Designed for Extended Life & high Performance, 4 Wire Black - Image 1](https://m.media-amazon.com/images/I/510gBhXGomL.jpg)
![Bgears b-Blaster 140x38 (PWM Version) Extreme Cooling Gaming PC & Mining Machine Fan, Hi-Speed 5200RPM w/Airflow of 308 CFM, 2 Ball Bearing Designed for Extended Life & high Performance, 4 Wire Black - Image 2](https://m.media-amazon.com/images/I/61cRdsmDmML.jpg)
![Bgears b-Blaster 140x38 (PWM Version) Extreme Cooling Gaming PC & Mining Machine Fan, Hi-Speed 5200RPM w/Airflow of 308 CFM, 2 Ball Bearing Designed for Extended Life & high Performance, 4 Wire Black - Image 3](https://m.media-amazon.com/images/I/41teDzbM0qL.jpg)
![Bgears b-Blaster 140x38 (PWM Version) Extreme Cooling Gaming PC & Mining Machine Fan, Hi-Speed 5200RPM w/Airflow of 308 CFM, 2 Ball Bearing Designed for Extended Life & high Performance, 4 Wire Black - Image 4](https://m.media-amazon.com/images/I/51s3eNN5LSL.jpg)
![Bgears b-Blaster 140x38 (PWM Version) Extreme Cooling Gaming PC & Mining Machine Fan, Hi-Speed 5200RPM w/Airflow of 308 CFM, 2 Ball Bearing Designed for Extended Life & high Performance, 4 Wire Black - Image 5](https://m.media-amazon.com/images/I/41tlY61bBeL.jpg)

## Available Options

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

## Questions & Answers

**Q: Is this fan reversible ?**
A: Turn the fan around.

**Q: What is the PWM voltage range?**
A: Per the product label (refer ro the picture I posted with my review), the specs are:

Starting Voltage (VDC): 7
Operating Voltage (VDC): 9-15

The optimal voltage, however, is likely 12. If you need to adjust the speed, you can use a PWM controller like Noctua's NA-FC1. I have been using that controller with these fans, and it works beautifully.

Does that help?

**Q: Can this fan be run on just the red and black wires?**
A: Yes this can be done but keep in mind that you will not have any software based speed control unless you have a physical controller in the loop.

**Q: What is the minimum PWM duty cycle at which these will run?**
A: I am not sure about the PWM duty cycle as I use this fan in a different setup using a rheostat. The lowest I have run this at so far is at 5.8V which is roughly 48% of the rated voltage.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Bgears Blasts one out of the park with these Fan-tastic Air-Movers!
*by O***M on August 31, 2012*

I have been researching, planning, and buying parts for my new "My Ultimate Machine" since January of this year, about 8 months ago (bought first round of parts at the end of May). I am a student in a field that deals with a well-above-average amount of physics, and I have been involved in modifying and racing/tracking BMW's (autocross and road course) for about 7 years now, which has taught me an IMMENSE amount about cooling systems, efficiency, proper design, and so forth. Anyway, I decided at the last minute to switch from a 3770K + Z77 board (tired of waiting for Maximus V Extreme) to the much more powerful, overclock-friendly 3930K and Rampage IV Extreme X79. This did, however, necessitate finding a different case as the budget for these two parts went up by $400 and thus the CaseLabs TH10 would have to wait. I found the NZXT Switch 810, and fell in love. A big part of this build is the water cooling system (custom, not the sealed unit "liquid coolers" that are nothing more than "high end" air coolers). After seeing the GTX670's performance, I was able to save 25% compared to buying a GTX680 while retaining 93-98% of the 680's performance, and with the EVGA GTX670 FTW I am able to use full-coverage 680 blocks, important to me personally. I did tons of reading on liquid cooling, and even with my background it was pretty much all new to me (cooling a 200F+ car is much different than cooling a computer). I decided that I had to take advantage of the space offered by the Switch 810, which I got in white and is an absolutely incredible computer case BTW. That meant using one of the 3x140 (aka 420) rads up top instead of the far-more-common 3x120 (360) models, as the extra surface area of 3 140mm fans compared to 120mm fans is significant; in fact, a 3x140mm radiator actually has about 5,400sq-mm more surface area than a 4x120mm radiator! The problem was, there was no way I could fit a 60mm thick rad in there with push-pull fans due to the 8+4pin EPS (CPU Power) connections, the VRM/MOSFET heatsink, etc. That meant instead of going with a thick radiator with a medium-low fin count of 9-12 fins per inch, I would need to find a thinner radiator that somehow was able to compete with the thicker models. Typically, how they manage this is by increasing the fin density to around 20fpi but a couple have an insane 30fpi, requiring a tornado of a fan (think 3800-5400rpm 120x38mm industrial fans) setup to reach their potential. As I do not wish to sit next to a VTOL Case, I did some more digging... I found the XSPC EX420 radiator, only 36.5mm thick, and was designed specifically to provide a thin radiator with performance that meets or exceeds thicker radiators at most fan speeds, although below 1000-1200rpm the thicker rads tend to perform a bit better. The reason this rad performs so well is that while it uses a moderate-high fin density of 19fpi, it is unique in that measuring the fins linearly does not provide the whole picture at all... Unlike any other rad that I have ever seen, the EX-series use split-fins, so in the same space that any other rad would have 19 fins, the EX has 38; yet because the way they did this was to add twice as many rows of fins rather than twice as many fins per row, the EX is absolutely the best-scaling radiator I have used in terms of performance:fan speed. Once you get above 1500rpm, the EX pulls away from the pack, and at this point is outperforming almost all thick rads (Alphacool NeXXos UT60 is an exception, as it is tied with the EX for best-radiator IMHO). This performance continues to scale linearly to 3,000rpm and likely well-beyond, although it has not been tested at speeds higher. Also, I got an Alphacool NeXXos UT60 240 (2x120) all-copper radiator for the bottom of the case, which has 4x 120x25mm Koolance 2800rpm fans in push pull. So, after deciding on the radiator (EX420), I had to find some fans that would be able to eek as much performance as possible out of it, as 140mm fans are generally designed to move significant air (~55-75cfm) but do so as quietly as possible; thus, most 140 fans are ~900-1400rpm in speed. Another issue is static pressure, as a strong 120x25mm fan (such as the aforementioned Koolance ones) can push 5.4mmHg pressure, although that is actually extraordinarily high with most "performance fans" being somewhere between 2.2 and 3.7mmHg (120x38mm fans increase static pressure around 40-70% over their 25mm-thick brethren, assuming they are otherwise equivalent). Also, I was faced with the issue of finding a fan that operated, and was reliable, while operating in a position blowing air "upward"; this is a position that sleeve-bearing fans, rifle-bearing fans, Hydrodynamic Bearing fans, and the like all face. THEN I FOUND THE BGEARS BLASTERS 140MM FANS!!!! I am NOT exaggerating when I say that these are by far the most powerful 140mm fans I have ever used (excluding the $75-200 server-grade 140x25/38mm fans). PROS: + Absolutely the best price:performance ratio I've seen in a LONG TIME!!! Why pay $20-30 for an inferior fan??? + 103 cubic-feet-per-minute of airflow is accurate, and this fan blows significantly more air than any other 140mm fan out there, although the Akasa Viper does come close + 3.5mmHg Static Pressure is the ABSOLUTE HIGHEST for a consumer 140mm fan, period! If you are using 140mm radiators or heatsinks, these are ideal + Dual-Ball-Bearing Motor means it functions perfectly in any position, including horizontal mounting + Used in a push-pull setup on an EX420, they drop the DeltaT of the loop from 6.2C to 4.3C compared to push-pull Cougar fans + Used in just a "push" setup on the same radiator, they still maintain a better delta t than any setup of Cougar, Noctua, Scythe, Noiseblocker fans + Incredibly quiet at 80% fan speed, only becomes "loud" above 80-85% but even then, they aren't obnoxiously loud or anything like that, you will simply know they are there + BALL BEARINGS + THE BEST 140mm fan you can get for use on ANY 140 rad!!! CONS: - NOT FOR SILENT PC USERS - You really should get a fan controller - Some people have had noise issues - It doesn't make me a sandwich :( Seriously, though, there aren't really any negatives if you know what you're doing. Use a rubber gasket or 7mm Phobya rubber shroud between the fan and rad/case, use rubber washers on the screw to decouple the fan, and USE A FAN CONTROLLER! If I have to tell you these things, you probably aren't ideal for a liquid cooling system... 10/10 stars!!!

### ⭐⭐⭐⭐⭐ My need is different. This was perfect for me.
*by 3***A on September 1, 2026*

I am not using it as a computer fan. I needed a small high flow 12v fan to use on my off road motorcycle. I don't use the RPM control but on full flow it moves a ton of air but is loud at an annoying pitch. Can't hear it under the helmet or the running bike so don't care. If you need a lot of flow and don't care bout sound, this is your fan.

### ⭐⭐⭐⭐⭐ Good fan that moves a lot of air - can be LOUD at full speed
*by W***N on October 10, 2025*

My old motherboard had issues with the PWM cpu fan socket, primarily due to archaic firmware and early PWM support. As a result, this fan ran at full speed or 75% speed only. At 5000 rpm I couldn't hear myself think in my office so I started turning off my computer while working (I work from home). I tried several fan controllers and finally got one with true PWM support and was able to dial down the fan noise a bit. Unfortunately the controller developed a fault and I had to return it. I ended up buying a different brand of lower speed fans with less aggressive blade architecture which were quieter. These fans are good for what they are, dual ball-bearing, industrial grade high RPM fans that really move the air, but they were too noisy for my needs. I put it in my parts bin for future use. I'm sure a need will present itself sometime and it will get used sometime.

## Frequently Bought Together

- Bgears b-Blaster 140x38 (PWM Version) Extreme Cooling Gaming PC & Mining Machine Fan, Hi-Speed 5200RPM w/Airflow of 308 CFM, 2 Ball Bearing Designed for Extended Life & high Performance, 4 Wire Black
- Noctua NA-FC1, 4-Pin PWM Fan Controller (Black)

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*Product available on Desertcart Belgium*
*Store origin: BE*
*Last updated: 2026-09-27*