Hardware Spec Index

Brontix FN-4391 Pro 120mm PWM Case Fan

Case Fans · Brontix · SKU FN4391-PRO · Released 2022 · Updated 2026-10-25

Key facts

Benchmark index402 (Case Fans scale)
Category rank#20,104
Street price$9
Power3 W
Performance per dollar44.67
Released2022

Specifications

BrandBrontix
ModelBrontix FN-4391 Pro
Size120 × 120 × 25 mm
Speed200–2,100 RPM (PWM)
Airflow71.4 CFM
Static pressure2.31 mmH₂O
Noise29 dBA
BearingFluid dynamic bearing
Connector4-pin PWM
Rated lifetime150,000 hours

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Cite this page: Hardware Spec Index, “Brontix FN-4391 Pro 120mm PWM Case Fan”, https://vextor7.com/item/1621074 (accessed 2026-10-25).