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  • Cooler Master SickleFlow 120 - Sleeve Bearing 120mm Blue LED Silent Fan for Computer Cases, CPU Coolers, and Radiators
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Cooler Master SickleFlow 120 - Sleeve Bearing 120mm Blue LED Silent Fan for Computer Cases, CPU Coolers, and Radiators

| 62 answered questions

Price: $11.61 & FREE Shipping on orders over $35. Details
In Stock.
Ships from and sold by Amazon.com. Gift-wrap available.
Blue
  • Up to 69.69 CFM (maximum RPM)
  • 19 dB-A silent application for CPU cooling
  • RoHS compliance for protecting the environment
  • Recommended for V10, V8, Hyper 212, Hyper Z600, Gemini, Cosmos, Cosmos S, Haf 932, HAF 922, CM Storm Scout and Sniper
  • 50,000 long life hours
29 new from $6.00 1 used from $84.41

Frequently Bought Together

Cooler Master SickleFlow 120 - Sleeve Bearing 120mm Blue LED Silent 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: $52.46

Buy the selected items together



Technical Details

Color: Blue
  • Brand Name: Cooler Master
  • Model: R4-L2R-20AC-GP
  • Color Name: Blue
  • Device Type: Computer Case Cooling
  • Warranty: 1 year

Product Details

Color Name: Blue
  • Product Dimensions: 4.7 x 1 x 4.7 inches ; 4.2 ounces
  • Shipping Weight: 4.8 ounces (View shipping rates and policies)
  • Shipping: This item is also available for shipping to select countries outside the U.S.
  • ASIN: B0026ZPFCK
  • Item model number: R4-L2R-20AC-GP
  • Average Customer Review: 4.2 out of 5 stars  See all reviews (1,501 customer reviews)
  • Amazon Best Sellers Rank:
  • Date first available at Amazon.com: April 15, 2009

Product Description

Color: Blue

Product Description

Cooler Master R4-L2R-20AC-GP 120mm Blue LED Case Fan

From the Manufacturer

From the Manufacturer
R4 series fans offer a unity of maximum rotational speed and optimum airflow. Using a unique long-life sleeve bearing fan, the R4 series offers long life rating of 50,000 hours. R4 series fans perform at a maximum of 90CFM at 2000RPM.


  • Up to 69.69 CFM maximum RPM.
  • 19 dB-A silent application for CPU cooling.
  • RoHS compliance for protecting the environment.
  • Recommended for V10, V8, Hyper 212, Hyper Z600, Gemini, Cosmos, Cosmos S, HAF 932, HAF 922, CM Storm Scout and Sniper.
  • 50,000 fan life expectancy.


Model R4-L2R-20AC-GP
Dimension 120mm x 120mm x 25mm
Voltage 12V DC
Current (Ampere) 0.35A
Input (Watt) 4.2W +/- 10%
Speed (R.P.M) 2000 R.P.M
Air Flow (CFM) Up to 90 CFM
Air Pressure (mmH20) 2.94 mmH20
Fan Noise (dB-a) 19 dB-A
Weight 116g / 0.26lbs
LED Color Blue
Bearing Type Long Life Sleeve
Fan Life Expectancy 50,000 hours
Connector 3 pin
3 to 4 pin adapter 1 pcs
Screws 4 pcs

Customer Questions & Answers

Customer Reviews

These fans look and work great.
LusH-KiLL
The blue of the LED's is a nice dark color and looks good with the other blue lights of my computer.
Michael P. Barner
Fans are quiet and move lots of air.
Marie Daniels

Most Helpful Customer Reviews

77 of 87 people found the following review helpful By Wolvesland on August 4, 2009
Color Name: Blue
Its a fan. It spins and makes pretty blue lights. It does its job. Not too noisy.
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20 of 20 people found the following review helpful By Jaime Llamas on March 30, 2010
Color Name: Smoke Verified Purchase
I love the fan works great!!!! The only thing is on Amazon it say its a 90CFM but it's a really 69CFM Fan !!!!!!
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56 of 65 people found the following review helpful By J. J. Barinas on November 30, 2009
Color Name: Blue Verified Purchase
I bought 2 of these to replace the fans that came in my case. I am very happy with these so far. They are very quiet and move plenty of air.My case temp hit about 40c tops with the fans set at the lowest speed setting in the BIOS.I have 2 Radeon 4770 cards running in crossfire mode, as well as having my system overclocked.
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38 of 43 people found the following review helpful By J. Giussi on October 8, 2009
Color Name: Blue Verified Purchase
When you buy a cooler master product you know you can't go wrong. I bought one of the 120mm green led fans plus one with red leds and another one with blue leds. They work like a charm. Quiet and reliable. I'm very happy with them and I'd recommend them to anyone.
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37 of 44 people found the following review helpful By D.L.C on October 10, 2009
Color Name: Smoke Verified Purchase
The Good:
Light, almost entirely made of super light plastic.
Lots of blades for air movement
In my opinion, no LEDs which attracts bugs at night. Nothing more fun then finding spiders and insect bodies on the bottom of your case! (Sarcasm if you missed it)
Potential 90 CFM. For a 120 mm fan, that's awesome.
Comes with 3 pin converter to Molex (4 pin)

The Bad:
Somewhat loud, but hardly as bad as some other fans. 19 Decibels isn't bad.
Not free?

Conclusion:

Excellent buy for the price. Hard to find another 120 mm case fan that moves that much air for the same price.
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23 of 28 people found the following review helpful By Gerald G. on April 7, 2010
Color Name: Blue Verified Purchase
These fans are by far the quietest that I have tried. I have five different makes of similar type fans and none are as quiet as these. They still move a surprising amount of air and I have installed six of them in two computers now. Mine have run for about a month at this time.
One thing I've noticed, and this is true of my other make fans to a lesser degree, is that placing the inlet side of the fan against a grille will cause a whine---they must be spaced a little away to avoid this. A grille on the outlet side doesn't have this effect.
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6 of 6 people found the following review helpful By Dan W on November 9, 2009
Color Name: Blue Verified Purchase
I didn't think I was going to get much quality for $10, but I was pleasantly surprised. This fan does provide a nice amount of air and is very quiet. I used these after using some Antec Tri Cool fans and the fan is a lot dimmer in light output which I find as a plus. You can still see the light but it won't light up a room at night. It does not have a speed switch like my previous Antec, but since it's so quiet it's not really an issue.
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11 of 13 people found the following review helpful By Heelz on May 22, 2009
Color Name: Smoke Verified Purchase
Just got two of these today and installed them. They are a little noiser than the masscool 120mm fans that were inside previously. I will say due to the higher air flow rate they cooled my cpu and MB temps by about 3 maybe 4 degrees. So for the money I paid they are a decent deal, it would be nicer if they came with a fan control to lower their r.p.m. to reduce some noise.
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