Hardware Spec Index

Brontix FN-3974 Prime 140mm PWM Case Fan

Case Fans · Brontix · SKU FN3974-PRIME · Released 2020 · Updated 2026-10-20

Key facts

Benchmark index760 (Case Fans scale)
Category rank#40,068
Street price$19
Power4 W
Performance per dollar40.00
Released2020

Specifications

BrandBrontix
ModelBrontix FN-3974 Prime
Size140 × 140 × 25 mm
Speed500–2,700 RPM (PWM)
Airflow129.6 CFM
Static pressure2.56 mmH₂O
Noise36 dBA
BearingMagnetic levitation
Connector4-pin PWM
Rated lifetime150,000 hours

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Cite this page: Hardware Spec Index, “Brontix FN-3974 Prime 140mm PWM Case Fan”, https://vextor7.com/item/33330346 (accessed 2026-10-20).