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

  • 120mm
  • 2000 RPM 69.69 CFM
  • Long Life Sleeve
  • Pin It
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Case cooling is becoming more essential these days. Quality fans with better airflow inside your chassis will give you a more stable system. The SickleFlow 120 with 2000 RPM is no doubt one of the best case fans in the market.

  • newegg High Performance LED Fan The 120mm fan delivers strong airflow up to 69.69 CFM for impressive heat dissipation while its transparent dark-gray blades give better LED effect.
  • newegg Whisper-quiet As an excellent choice for case cooling, the 120mm fan keeps the noise level down to 19 dBA for silent operation.
  • newegg Long Life The fan uses long life sleeve bearing for longer life expectancy.

Learn more about the Cooler Master R4-L2R-20AR-R1


SickleFlow 120


Case Fan
Fan Size
Bearing Type
Long Life Sleeve
2000 RPM
Air Flow
69.69 CFM
Noise Level
19 dBA
Power Connector
3 Pin
Transparent dark-gray
4 Red LED

Physical Spec

120 x 120 x 25 mm


Transparent dark-gray fan blades for better LED effect

Long life sleeve bearing for longer life expectancy

Strong air flow to fortify cooling efficiency

Silent operation as an excellent choice for case cooling

RoHS compliance

3 to 4 Pin Adapter included

Recommended for V10, V8, V6, Hyper 212+, Cosmos, Cosmos S, HAF 912, HAF 922, HAF 932, HAF X, CM 690 II, CM Storm Scout and Sniper.

Air pressure (mmH2O): 2.94 mmH2O
Life Expectation: 50,000 hours
Rated Voltage: 12 VDC
Current (Ampere): 0.35A ± 10%
Power consumption: 4.2W ± 10%
Weight: 116 g
Screws: 4 pcs

Manufacturer Warranty

1 year limited
1 year limited

Quick Info

Customer Reviews of the Cooler Master R4-L2R-20AR-R1

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  • chris c.
  • 9/19/2014 2:30:26 AM
  • Tech Level: Somewhat High
  • Ownership: 1 day to 1 week
  • Verified Owner

1 out of 5 eggsTotal poop

Pros: Pretty color

Cons: So loud. Shows 30-40 db. Do not get these. Sadly i bought 6 of these. waste of money. wouldn't use even if i got'em free

Manufacturer Response:

Hello Chris c,

I apologize the fan is to loud for your system. If you have any other questions regarding this product, please contact us.

Thank You for choosing Cooler Master!!

CMUSA Support

Did you find this review helpful? Yes No

  • Gene G.
  • 9/8/2014 12:15:38 PM
  • Tech Level: Somewhat High
  • Ownership: 1 month to 1 year
  • Verified Owner

5 out of 5 eggsVery good

Pros: Looks good in the front of my case.Moves a lot of air.

Cons: None

Other Thoughts: Fast shipping.

Did you find this review helpful? Yes No

  • Emanuel I.
  • 9/6/2014 4:02:55 PM
  • Tech Level: Average
  • Ownership: 1 month to 1 year
  • Verified Owner

3 out of 5 eggsLOUD but effective...

Pros: It moves air like there's no tomorrow. It actually broke skin on my finger once when I touched the blades... THAT'S how much power and torque it has. It also looks really cool with the LED's on, but you can only REALLY see them if it's an intake fan or you have a window.

Cons: LOUD. Like, OBNOXIOUSLY LOUD. If you use a headset you may not hear it, but still... it ROARS even turned to the minimum speed.

Other Thoughts: If you need this for a computer or something that really really NEEDS the power, go for it. Otherwise, spend a few more bucks and get something with a teeny bit less power and get some peace and quiet.

Did you find this review helpful? Yes No

  • Eddie B.
  • 9/6/2014 1:35:38 PM
  • Tech Level: Somewhat High
  • Ownership: 1 week to 1 month

4 out of 5 eggsAwesome

Pros: nice airflow quickly moves air

Cons: the leds are not all that bright

Did you find this review helpful? Yes No

  • jason c.
  • 8/27/2014 6:21:39 AM
  • Tech Level: Average
  • Ownership: less than 1 day
  • Verified Owner

3 out of 5 eggsPretty Good overall

Pros: fast and pretty darn quiet. pretty well built overall

Cons: only reason this didn't get a perfect:

1) i ordered 5. each one has 4 leds on the corners. one of the 5 came with a broken one and i'm too lazy to RMA just one for something this cheap. ($7.99-$5 rebate=$2.99). 3/4 leds still glow on this one.

2) there may be a way on the bios to set fan speed, but i don't know. as far as i know it's one speed

Other Thoughts: needs a speed control, personally i preger a switch that you can manually set like some other manufacturers, but this is still quieter. i would still buy more.

Did you find this review helpful? Yes No

  • adam p.
  • 8/25/2014 5:50:05 PM
  • Tech Level: Somewhat High
  • Ownership: 1 month to 1 year
  • Verified Owner

4 out of 5 eggsGood Fans

Pros: These Fans push a good amount of air and are not very loud. Sleek black design.

Cons: Led's are pretty dull, not very bright. Look more like red dots instead a red glow.

Other Thoughts: Good fan in regards to the fan features and considering the cheap price a good buy, but if your looking for better cosmetic glow. look elsewhere.

Did you find this review helpful? Yes No

  • Robert P.
  • 8/22/2014 12:50:41 PM
  • Tech Level: High
  • Ownership: more than 1 year

5 out of 5 eggsGreat fan 0.37 amp model

Pros: Lots of airflow. Suitable for use with liquid cooling next to radiator, at back of case, side of case or top exhaust.

Cons: NONE.

Other Thoughts: This is the powerful 0.37 amp model fan. It blows hard and a lot of air so it makes more noise at full speed. You can probably control speed if plugged into motherboard.
Cooler Master also makes a less powerful 0.16 amp fan which moves less air and makes less noise. I think people do not understand the difference between the 2 choices. The 0.16 amp fan usually comes pre-installed in the case while the 0.37 amp fan comes with the liquid coolers or available separately.

Know what to buy and you won't be dissapointed.

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  • Carleen P.
  • 8/21/2014 4:25:41 PM
  • Tech Level: Somewhat High
  • Ownership: less than 1 day
  • Verified Owner

5 out of 5 eggs

Pros: Good Fan, Moves a good amount of air around

Cons: None

Other Thoughts: One thing to keep in mind for when you are purchasing this product is that the LEDs are very dim so if you are looking for something to light up your case then this is not for you

Did you find this review helpful? Yes No

  • Ryan M.
  • 8/13/2014 1:35:33 PM
  • Tech Level: Somewhat High
  • Ownership: 1 month to 1 year
  • Verified Owner

2 out of 5 eggshorizontal position - look else where

Pros: +good price
+I like the LEDS

Cons: -Noisy fan in horizontal fan (bottom of the case)
-Fan doesn't move in a focused direct for of a fountain spread of air movement.
-barely can feel the air movement.
-I believe the specs to be factitious.

Other Thoughts: I bought two of these and going to change them out for Corsair Fans.

Manufacturer Response:

Hello Ryan M,

We apologize for the trouble that you are experiencing with the Sickleflow 120mm fans. Please contact us for further trouble shooting and so we can resolve the issue.

Phone: 888-624-5099

CMUSA Support

1 out of 1 people found this review helpful. Did you? Yes No

  • Jeff W.
  • 8/9/2014 3:01:51 PM
  • Tech Level: Somewhat High
  • Ownership: more than 1 year
  • Verified Owner

3 out of 5 eggsGood while it lasted

Pros: Fan was quiet - pushed air well for the small case I had

Cons: Died after 2 years, started squeeking and then just wouldn't spin anymore

Did you find this review helpful? Yes No

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