Hardware Spec Index

Brontix FN-5781 Pro 140mm PWM Case Fan (3-Pack)

Case Fans · Brontix · SKU FN5781-PRO · Released 2021 · Updated 2026-10-20

Key facts

Benchmark index364 (Case Fans scale)
Category rank#23,122
Street price$19
Power3 W
Performance per dollar19.16
Released2021

Specifications

BrandBrontix
ModelBrontix FN-5781 Pro
Size140 × 140 × 25 mm
Speed200–1,700 RPM (PWM)
Airflow81.6 CFM
Static pressure1.61 mmH₂O
Noise34 dBA
BearingFluid dynamic bearing
Connector4-pin PWM
Rated lifetime50,000 hours

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Cite this page: Hardware Spec Index, “Brontix FN-5781 Pro 140mm PWM Case Fan (3-Pack)”, https://vextor7.com/item/2016575 (accessed 2026-10-20).