Hardware Spec Index

Brontix FN-3939 Prime 120mm PWM Case Fan

Case Fans · Brontix · SKU FN3939-PRIME · Released 2021 · Updated 2026-10-20

Key facts

Benchmark index724 (Case Fans scale)
Category rank#20,000
Street price$19
Power3 W
Performance per dollar38.11
Released2021

Specifications

BrandBrontix
ModelBrontix FN-3939 Prime
Size120 × 120 × 25 mm
Speed200–1,600 RPM (PWM)
Airflow54.4 CFM
Static pressure1.76 mmH₂O
Noise36 dBA
BearingMagnetic levitation
Connector4-pin PWM
Rated lifetime100,000 hours

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Cite this page: Hardware Spec Index, “Brontix FN-3939 Prime 120mm PWM Case Fan”, https://vextor7.com/item/4580767 (accessed 2026-10-20).