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Three black 120mm case fans with frosted blades and illuminated hubs, ARGB lighting, triple pack

be quiet!

be quiet! BL121 LIGHT WINGS LX 120mm PWM ARGB Case Fan Triple Pack

SKU CH-3S56-XSEWD MPN BL121

Three 120mm PWM fans with ARGB lighting deliver 51.5 CFM airflow and 25.5 dBA noise

  • Fan size120 mm
  • Number of fans3 Fans
  • Fan depth25 mm
  • Bearing designRifle
  • Rotational speed1,600 RPM
  • Airflow rate51.5 CFM

Fan Size 120mm

Model LIGHT WINGS LX PWM

Model Triple Pack

  • Three-fan bundle simplifies ARGB cooling builds
  • Illuminated hub with 16 LEDs lights frosted blades for vivid effects
  • 7 optimised blades deliver 51.5 CFM airflow at 1.34 mmH2O pressure
  • Rifle bearing rated for 60000 hours ensures long service life
  • 4-pin PWM runs as low as 25.5 dBA for quiet operation

Triple pack of 120mm ARGB case fans

The be quiet! BL121 LIGHT WINGS LX triple pack delivers three 120mm PWM fans with addressable RGB lighting for system builders who value coordinated illumination and airflow. Each fan features 16 LEDs shining through frosted blades and an illuminated hub to create a uniform visual effect across the case interior. The rifle bearing is rated for 60000 hours of operation.

Check 4-pin PWM headers

Verify that your motherboard or fan hub provides enough 4-pin PWM headers for three fans or plan for a splitter cable to manage power and speed control. The ARGB connection uses a daisy-chain cable so a single 5V 3-pin ARGB header can drive the lighting for all three units. Ensure your case has mounting points for 120mm fans with 25mm thickness before ordering.

Sustained airflow at 1600 RPM with 25.5 dBA noise

At full speed the fans move 51.5 CFM while generating 1.34 mmH2O of static pressure, maintaining consistent cooling performance during extended workloads. The low starting RPM allows quiet operation at reduced loads without stalling, and the rifle bearing maintains stable acoustics over long sessions. This balance suits radiators or restrictive meshes where steady pressure matters more than peak burst speed.

How it compares

Measured against everything we stock in PC Cooling Fans, at today’s prices. Recalculated every night.

Price $48.99
Pricier than about 89% of the 8,339 comparable items (median $19.99).
Fan size 120 mm
Typical for this category: the median of 1,114 items is 120 mm.

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Specifications

Product
Brand namebe quiet!
Product lineLIGHT WINGS LX 120 mm PWM
Model nameBL121
Product typeCase Fan
Product colorBlack
Performance
Rotational speed1,600 RPM
Airflow rate51.5 CFM
Air pressure rating1.34 mmH2O
Power
Power input connector4-pin PWM
Size & build
Fan size120 mm
Number of fans3 Fans
Fan depth25 mm
Bearing designRifle
Product dimensions120 × 120 × 25 mm
Shipping weight0.45 kg
Package size152 × 127 × 76 mm
Environment & compliance
Operating noise25.5 dBA
More details
LED lightingARGB

Other versions of this model

5 more in the same range

Questions about this item

Does the triple pack include the ARGB daisy-chain cables or must they be purchased separately?

The three fans ship with ARGB connection cables that support daisy chaining, so no extra cables are needed.

How do the 1600 RPM maximum speed and 1.34 mmH2O pressure help me choose between this triple pack and a single fan?

Each fan delivers 51.5 CFM airflow at 25.5 dBA, so the triple pack simply multiplies that cooling capacity across three mounting points.

What does the 25.5 dBA noise rating mean once all three fans are running inside a case?

At full speed the trio produces a combined sound level around 25.5 dBA, which is barely audible in a typical system.

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