Hardware Spec Index

Brontix FN-9640 Pro 140mm PWM Case Fan (3-Pack)

Case Fans · Brontix · SKU FN9640-PRO · Released 2021 · Updated 2026-10-20

Key facts

Benchmark index238 (Case Fans scale)
Category rank#29,302
Street price$9
Power3 W
Performance per dollar26.44
Released2021

Specifications

BrandBrontix
ModelBrontix FN-9640 Pro
Size140 × 140 × 25 mm
Speed200–1,600 RPM (PWM)
Airflow76.8 CFM
Static pressure1.52 mmH₂O
Noise35 dBA
BearingFluid dynamic bearing
Connector4-pin PWM
Rated lifetime100,000 hours

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Cite this page: Hardware Spec Index, “Brontix FN-9640 Pro 140mm PWM Case Fan (3-Pack)”, https://vextor7.com/item/4153067 (accessed 2026-10-20).