Hardware Spec Index

Brontix FN-3981 Prime 120mm PWM Case Fan

Case Fans · Brontix · SKU FN3981-PRIME · Released 2022 · Updated 2026-10-23

Key facts

Benchmark index675 (Case Fans scale)
Category rank#34,897
Street price$19
Power3 W
Performance per dollar35.53
Released2022

Specifications

BrandBrontix
ModelBrontix FN-3981 Prime
Size120 × 120 × 25 mm
Speed300–2,000 RPM (PWM)
Airflow68.0 CFM
Static pressure2.20 mmH₂O
Noise31 dBA
BearingFluid dynamic bearing
Connector4-pin PWM
Rated lifetime150,000 hours

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Cite this page: Hardware Spec Index, “Brontix FN-3981 Prime 120mm PWM Case Fan”, https://vextor7.com/item/20128726 (accessed 2026-10-23).