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  • Cooler Master Blade Master 120 - Sleeve Bearing 120mm PWM Cooling Fan for Computer Cases, CPU Coolers, and Radiators
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Cooler Master Blade Master 120 - Sleeve Bearing 120mm PWM Cooling Fan for Computer Cases, CPU Coolers, and Radiators

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List Price: $34.33
Price: $9.80 & FREE Shipping on orders over $35. Details
You Save: $24.53 (71%)
In Stock.
Ships from and sold by Amazon.com. Gift-wrap available.
120 mm
  • Well-balanced cooling performance with 21.2-76.8 CFM fan airflow, air pressure, and noise
  • Wide PWM fan speed range between 600-2000 R.P.M.
  • Anti-vibration rubber pads around the edges to decrease noise
  • Distinguished blade shape for airflow improvement.
  • Power Connector: 4 Pin
22 new from $4.88 1 used from $7.00

Frequently Bought Together

Cooler Master Blade Master 120 - Sleeve Bearing 120mm PWM Cooling Fan for Computer Cases, CPU Coolers, and Radiators + Cooler Master Hyper 212 EVO - CPU Cooler with 120mm PWM Fan (RR-212E-20PK-R2) + Arctic Silver 5 Thermal Compound 3.5 Grams
Price for all three: $50.72

Buy the selected items together


Special Offers and Product Promotions

Size: 120 mm
  • Buy Used and Save: Buy a Used "Cooler Master Blade Master 120 - Sleeve Bearing 12..." and save 79% off the $34.33 list price. Buy with confidence as the condition of this item and its timely delivery are guaranteed under the "Amazon A-to-z Guarantee". See all Used offers.
  • Get a $100 Amazon.com Gift Card: Get the Discover it chrome card and get a $100.00 Amazon.com Gift Card* after your first purchase within 3 months. Learn more.

Technical Details

Size: 120 mm
  • Brand Name: Cooler Master
  • Model: R4-BMBS-20PK-R0
  • Color Name: Black

Product Details

Size: 120 mm
  • Product Dimensions: 4.7 x 4.7 x 1 inches ; 5.9 ounces
  • Shipping Weight: 7.8 ounces (View shipping rates and policies)
  • Shipping: This item is also available for shipping to select countries outside the U.S.
  • ASIN: B0030DL37I
  • Item model number: R4-BMBS-20PK-R0
  • Average Customer Review: 4.3 out of 5 stars  See all reviews (245 customer reviews)
  • Amazon Best Sellers Rank:
  • Date first available at Amazon.com: December 11, 2009
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Product Description

Size: 120 mm

When ultra-high performance coolers demand additional performance, count on Blade Master PWM fan series to increase cooling efficiency. Blade Master offers a balance of high air pressure with balanced airflow and minimal noise levels. With the Blade Master family of 120mm, 92mm, and 80mm fans, unique wave-form blades create increased pressure that exceeds competitor fans at the same airflow. The highest air pressure allows Blade Master fans to blow directly through dense performance heat sinks for extreme cooling.

Customer Questions & Answers

Customer Reviews

This is a good generic fan, very quiet and PWM works great.
Amazon Customer
The fan is very quiet and seems to move a lot of air for its size.
Stephen
It is the second fan on my Cooler Master Hyper 212 Plus Cooler.
Gemmer

Most Helpful Customer Reviews

78 of 80 people found the following review helpful By Stomper on October 15, 2010
Size Name: 120 mm Verified Purchase
Since this is a PWM fan, any review should be based on that fact. If you plug this fan into a 3 pin (non PWM) outlet, you will be shocked by how loud it is. But a PWM fan should only run at 100% when your system is nearly overheating. A properly tuned PWM fan should be at its lowest rpm (about 700 for this one) when you are surfing the web, and it should spin up only when your system gets hot (video compressing, gaming, etc).

This fan is perfect when used as a well tuned PWM fan. I use SpeedFan to customize my settings. I set the target CPU temp to 54 degrees C, and I allow it increments of 3 PWM (the default is 10, which causes noticeable noise changes). This creates an almost silent PC while idle (like surfing, word processing, etc). After a game has been running for 4 or 5 minutes, the fans get to about 1300rpm and the CPU holds at 54. At this speed, the fan is only audible if I mute the gaming noises, but even then, its not annoying. At minimum speed, in a completely silent room in a rural house, I have to strain to hear them at their lowest speed (700rpm).

I actually have three of these chained together using a rosewill pwm splitter. One is on the CPU heatsink, the other two are case fans. They all spin up when the system gets warm. They never seem to go beyond 50% even when gaming with a hot Radeon 4890.

For the price, this is the best value PWM 120MM fan I could find. The Scythe PWM 120mm seems like it might be able to push more air for a given db of noise, but you can get three of these fans for the price of two of those.
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48 of 51 people found the following review helpful By Robert Wurzburg on October 23, 2010
Size Name: 92 mm Verified Purchase
I purchased these fans to use in PC's because many of them require a PWM (Pulse Width Modulation) type fan for
connection to a 4-pin connector on the motherboards. It has good airflow, and fits anywhere a standard 3-pin
fan does in a computer case. It can also be used as a replacement fan on a cooler assembly, which many CPU's
require these days on motherboards using the 4 pin connector and PWM to control the fan assembly. Many of them
have 3 pin fan connectors for all other case fans.

Pulse width modulation is a way of controlling the fan speed using an amplifier on the motherboard, that will
vary the width of the signal (timing) or height (voltage) to increase or decrease the fan speed based on the
sensed CPU core temperature. A 3-pin fan by contrast, only receives a return signal on the 3rd wire telling
the CPU's fan operational amplifier it is spinning. Without the return voltage signal the computer will shut
down, signifying the fan has failed and turning off to protect your PC's processor from overheating. This is
also done for any other fan that has this type of support on the motherboard. That's why it's important that
you connect your fans to the motherboard connectors, instead of the power supply's.

These fans were used on an Intel DH55HC motherboard in an Antec 300 case. The Intel mobo has only PWM fans.
They were the 120mm and 80mm PWM Cooler Master fans.
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25 of 27 people found the following review helpful By Amazon Customer on April 20, 2011
Size Name: 120 mm Verified Purchase
I added this fan to my Hyper 212+ cpu cooler and it works great. I made the mistake of buying a different CM fan than this only to later realize that I needed a PWM fan. If you are adding a second fan to your Hyper 212+, this is the fan you want! It is relatively quiet and pushes alot of air. Great fan for the money!
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5 of 5 people found the following review helpful By W. Rehs on June 6, 2011
Size Name: 120 mm Verified Purchase
Purchased a pair of these fans to use in a push/pull configuration to replace the one stock fan provided with the Corsair H60 Hydro CPU Cooler. Since I wanted to monitor and have control of the CPU fans speed it was important to insure the fans I selected provided PWM and were of high quality. These fans fit the bill. Using a 4pin Y cable I attached both fans to the CPU fan header on the motherboard. Fortunately the H60 Cpu cooler is so efficient I've never seen the BladeMasters spin above 1500rpm's and very briefly, but I'm happy to report that at least up to that speed they are very low noise. Three of my other 5 fans I have running in my system are 140mm which normally runs quieter than a 120mm fan because they don't need to spin as fast. The 120mm needs to spin faster to push the equivalent amount of air as it's larger brethren. I cannot hear these fans running over any of the other fans I have in my case so they are obviously pretty quiet. The unique design of the blades provides concentrated direct air pressure which is great for using on Cpu water cooling radiators particuliarly as a push fan. For the price and quality I highly recommend this fan. I would definately purchase again and/or recommend them to others.
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5 of 6 people found the following review helpful By xCaldazar on December 17, 2011
Size Name: 120 mm Verified Purchase
Pros: Variable, and great when they work. Black

Cons: Quality control.

I ordered 3 at first, one scratched on the edges as it spun. It even left markings from doing so. I did an RMA on the single one. Figured well the other two are working great and I wanna move my whole case over to 4 pin fans. I ordered 3 more and they all had noisy bearings, scraping noises, etc. The RMA one came back and it seemed good at first until later I heard an offset, humming noise and tracked it down to that fan. I also heard one of the original ones starting to make noise. That is 6 out of 7 being unnecessarily noisy. I might up the rating if the next batch works out. Maybe I'm just unlucky or overly picky.
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