Hardware Spec Index

Brontix FN-3947 Prime 140mm PWM Case Fan

Case Fans · Brontix · SKU FN3947-PRIME · Released 2025 · Updated 2026-10-21

Key facts

Benchmark index690 (Case Fans scale)
Category rank#43,647
Street price$19
Power3 W
Performance per dollar36.32
Released2025

Specifications

BrandBrontix
ModelBrontix FN-3947 Prime
Size140 × 140 × 25 mm
Speed500–2,000 RPM (PWM)
Airflow96.0 CFM
Static pressure1.90 mmH₂O
Noise25 dBA
BearingFluid dynamic bearing
Connector4-pin PWM
Rated lifetime50,000 hours

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Cite this page: Hardware Spec Index, “Brontix FN-3947 Prime 140mm PWM Case Fan”, https://vextor7.com/item/7900959 (accessed 2026-10-21).