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Cooler Master > 
Item#: 9SIA6FR29M6019

Cooler Master SickleFlow 120 - Sleeve Bearing 120mm Silent Fan for Computer Cases, CPU Coolers, and Radiators (Smoke Color)

  • 120mm
  • 2000 RPM 69 CFM
  • Long Life Sleeve
  • 19 dBA
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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 69CFM at 2000RPM.

  • newegg High Performance The COOLER MASTER R4-C2R-20AC-GP case fan delivers up to 69CFM of air flow to efficiently and effectively dissipate the heat generated inside the chassis.
  • newegg Silent Operation This fan runs at 2000 R.P.M. and produces mere 19 dB-A noise level bringing peace of mind to you and your co-workers.
  • newegg Constructed to Last The high quality sleeve bearing fan provides maximum of 50,000 hours of lifespan for hassle-free long term use.

Learn more about the Cooler Master R4-C2R-20AC-GP

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Customer Reviews of the Cooler Master R4-C2R-20AC-GP

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  • Robert G.
  • 5/15/2015 1:45:25 PM
  • Tech Level: Somewhat High
  • Ownership: 1 month to 1 year
  • Verified Owner

3 out of 5 eggsMakes Case Hum

Pros: High Airflow

Cons: LOUD

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  • David S.
  • 5/11/2015 4:04:18 PM
  • Tech Level: High
  • Ownership: 1 month to 1 year
  • Verified Owner

5 out of 5 eggs69cfm and QUIET

Pros: Very quiet, yet move air? Can't even hear the fans running 2 feet away, with 4 of these in the case.
Move a LOT of air.

Cons: none so far

Other Thoughts: 1 intake (hard drive cooling), 1 exhaust (rear panel), 2 on a large CPU cooler, and very quiet. The sickle shaped blades are much quieter while moving a LOT of air.

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  • David S.
  • 5/10/2015 3:46:54 AM
  • Tech Level: High
  • Ownership: 1 week to 1 month
  • Verified Owner

5 out of 5 eggsVery quiet for high air flow

Pros: Rated 69cfm, usually means LOUD? These fans are QUIET and STILL MOVE AIR. My closed-case temps are only 5-degrees above ambient!. Can't even hear them running?

Cons: none, other than they are sleeve bearings.

Other Thoughts: Used to use Silverstone 110cfm fans, but they were so loud it was like having a leaf-blower running in the case. With 4 fans, it was just too loud, even with turning them down.

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  • Justin D.
  • 4/27/2015 4:41:50 PM
  • Tech Level: High
  • Ownership: 1 day to 1 week
  • Verified Owner

4 out of 5 eggsFantastic airflow for the price

Pros: These babies pull a ton of air and fit in well on 120mm cpu coolers.

Cons: WAY louder than advertised. I saw the 21db on the specifications and thought, "oh good that's quieter than what I have now"

Nope. These things are easily pulling 30-35db right now. (put one on cpu cooler and one on front intake) I may uninstall and buy quieter fans sometime soon...

Other Thoughts: Can't go wrong with cooler master, but consider SilenX 120mm fans if you want something quieter.

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  • Robert N.
  • 4/22/2015 12:49:25 PM
  • Tech Level: Somewhat High
  • Ownership: 1 week to 1 month
  • Verified Owner

1 out of 5 eggsBad Fan

Pros: NONE.

Cons: Not manufactured properly, defective. 2nd bad coolermaster fan for the same build. I'll never buy the brand again.

0 out of 2 people found this review helpful. Did you? Yes No

  • Kanna B.
  • 4/12/2015 10:57:40 AM
  • Tech Level: Average
  • Ownership: 1 month to 1 year
  • Verified Owner

5 out of 5 eggsNifty

Pros: It's a nice fan, comes with two different cords so you'll not have to worry about finding the right one to fit your motherboard/side cord.

Had no issues installing it at all.

Cons: It's a bit loud for my tastes, but it pulled the heat right out of my pc tower instantly so it runs like a champ for a long time if you need it to.

Other Thoughts: Maybe if the plastic casing was made a bit more slimmer, but that's just cosmetics so it's just a suggestion.

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  • Frankie M.
  • 3/28/2015 6:32:00 PM
  • Tech Level: Average
  • Ownership: 1 month to 1 year
  • Verified Owner

5 out of 5 eggsGood fan.

Pros: It is indeed quiet.
It has a nice look.
I can feel the cool.

Cons: None that I can see yet anyway.

Other Thoughts: Would like this in an 80mm if they have it then I'll have to grab it sometime.

Did you find this review helpful? Yes No

  • Anonymous
  • 3/26/2015 9:13:58 AM
  • Tech Level: High
  • Ownership: 1 week to 1 month
  • Verified Owner

5 out of 5 eggsGreat fans

Pros: keeps system cool, very quiet,

Cons: N/A

Did you find this review helpful? Yes No

  • jeffrey b.
  • 3/15/2015 9:49:37 PM
  • Tech Level: Somewhat High
  • Ownership: 1 month to 1 year
  • Verified Owner

5 out of 5 eggsIts cool man

Pros: A little quieter then my stock fan and moves more air.

Cons: none

Other Thoughts: Using in a push-pull set up as pull.
I found with just the stock fan my case gets warm. With two fans the case stays cool to the touch.
Will buy a second one when the stock fan craps out.

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  • William T.
  • 3/6/2015 8:11:09 AM
  • Tech Level: Somewhat High
  • Ownership: 1 month to 1 year
  • Verified Owner

3 out of 5 eggsWorks

Pros: Moves air.

Cons: Not silent (enough). On low speed, it is tolerable. At higher speeds this fan is louder than all of my other fans combined.

Other Thoughts: The 'Cooler Master' sticker in the middle was not centered when it was installed, so when the fan is running it is "wobbly" or unstable looking. Not a big deal. I have now replaced this fan with a different make. It works, so I'm keeping it for a backup fan.

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Home > 
Computer Hardware > 
Fans & PC Cooling > 
Case Fans > 
Cooler Master > 
Item#: 9SIA6FR29M6019
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