Hardware Spec Index

Brontix FN-3909 Pro 140mm PWM Case Fan

Case Fans · Brontix · SKU FN3909-PRO · Released 2023 · Updated 2026-10-21

Key facts

Benchmark index373 (Case Fans scale)
Category rank#34,264
Street price$9
Power3 W
Performance per dollar41.44
Released2023

Specifications

BrandBrontix
ModelBrontix FN-3909 Pro
Size140 × 140 × 25 mm
Speed200–1,700 RPM (PWM)
Airflow81.6 CFM
Static pressure1.61 mmH₂O
Noise36 dBA
BearingFluid dynamic bearing
Connector4-pin PWM
Rated lifetime50,000 hours

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Cite this page: Hardware Spec Index, “Brontix FN-3909 Pro 140mm PWM Case Fan”, https://vextor7.com/item/5314482 (accessed 2026-10-21).