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Black 80mm square-frame case fan with curved blades, 4-pin PWM connector

Cooler Master

Cooler Master SickleFlow 80 V2 MFX-B8NN-25NPK-R1 80mm case fan

SKU CH-J7FS-17DKF MPN MFX-B8NN-25NPK-R1

An 80 mm PWM case fan with a revised blade curve, reinforced frame and sealed bearing for 650–2500 RPM airflow up to 30 CFM at 6–25 dBA

  • Fan Counts1 Fan
  • Fan ControllerNo Controller
  • TypeCase Fan
  • CompatibilityCase & Air Coolers
  • Fan Size80mm
  • Fan Thickness25mm
  • All-black design fits stealth builds
  • Revised curve blades boost airflow and pressure
  • Reinforced frame cuts turbulence and noise
  • Sealed rifle bearing resists dust and oil loss
  • 4-pin PWM runs 650 to 2500 RPM

Compact 80 mm PWM fan for tight builds

This 80 mm case fan fits small-form-factor chassis and low-profile air coolers where a 120 mm unit will not mount. The 4-pin PWM connector lets the motherboard regulate speed automatically, so the fan runs only as fast as the thermal load demands. Its all-black, non-LED frame keeps the interior looking clean without added lighting.

Replaces noisy stock 80 mm fans when silence matters

Stock sleeve-bearing fans often whine above 1 000 RPM; this rifle-bearing model stays at 6 dBA at the 650 RPM floor and reaches 25 dBA at the 2 500 RPM ceiling. The jump is worth it when a build lives on a desk or in a media centre and the owner wants measurable airflow — 30 CFM — without an audible turbine. Builders who need more than 30 CFM or a larger mounting pattern should look elsewhere.

Mounts directly to 80 mm screw holes on cases

The 25 mm thick square frame aligns with standard 80 mm mounting points, so no adapter brackets are required. The reinforced ribbed frame reduces turbulent noise, while the two-tier sealed bearing resists dust ingress and oil loss for longer service life. A 4-pin PWM header on the motherboard is the only external connection needed.

Põhijooned

  • All-black design fits stealth builds
  • Revised curve blades boost airflow and pressure
  • Reinforced frame cuts turbulence and noise
  • Sealed rifle bearing resists dust and oil loss
  • 4-pin PWM runs 650 to 2500 RPM

Tehnilised andmed

BrandCOOLER MASTER
SeriesSickleFlow 80 V2
ModelMFX-B8NN-25NPK-R1
Fan Counts1 Fan
Fan ControllerNo Controller
TypeCase Fan
CompatibilityCase & Air Coolers
Fan Size80mm
Fan Thickness25mm
Bearing TypeRifle
RPM650 - 2500 RPM +/- 5%
Air Flow30 CFM +/- 10%
Noise Level6 - 25 dBA
Power Connector4-Pin PWM
ColorBlack
LEDNon-LED
FeaturesNo Colors Needed: Signature cooling performance with an all-black design: a perfect choice for all of the users who want a simple, sleek, and stealthy look.
New Blade Design: Revised curve blade design to improve airflow and air pressure.
Enhanced Fan Frame: Enhanced frame structure, reducing turbulent flow noise increase efficiency.
Sealed Bearing Structure: Two-tier sealing mechanism, preventing dust and lubricating oil leakage while increasing the fan’s operation stability and life span.
Dimensions80 x 80 x 25 mm
Tarnekaal0.13 kg
Pakendi mõõtmed201 × 114 × 32 mm

Küsimused selle toote kohta

Will the 80 mm square frame with 25 mm thickness fit my case or cooler mounting holes?

The fan measures 80 x 80 x 25 mm, matching the standard 80 mm mounting pattern used on most cases and air coolers.

How do I connect the 4-pin PWM cable so the motherboard controls speed between 650 and 2500 RPM?

Plug the 4-pin PWM connector into a motherboard PWM header; the board will then vary voltage to keep the fan within the 650 – 2500 RPM range.

Does the sealed rifle bearing need lubrication or replacement after extended use?

The two-tier sealed bearing is designed to prevent oil leakage and dust ingress, so no user lubrication or bearing replacement is required.

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