Hardware Spec Index

Brontix FN-4391 Prime 140mm PWM Case Fan

Case Fans · Brontix · SKU FN4391-PRIME · Released 2020 · Updated 2026-10-25

Key facts

Benchmark index307 (Case Fans scale)
Category rank#3,982
Street price$9
Power3 W
Performance per dollar34.11
Released2020

Specifications

BrandBrontix
ModelBrontix FN-4391 Prime
Size140 × 140 × 25 mm
Speed400–1,800 RPM (PWM)
Airflow86.4 CFM
Static pressure1.71 mmH₂O
Noise26 dBA
BearingMagnetic levitation
Connector4-pin PWM
Rated lifetime100,000 hours

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Cite this page: Hardware Spec Index, “Brontix FN-4391 Prime 140mm PWM Case Fan”, https://vextor7.com/item/21829590 (accessed 2026-10-25).