Hardware Spec Index

Brontix FN-3781 Ultra 120mm PWM Case Fan

Case Fans · Brontix · SKU FN3781-ULTRA · Released 2021 · Updated 2026-10-26

Key facts

Benchmark index222 (Case Fans scale)
Category rank#22,688
Street price$9
Power4 W
Performance per dollar24.67
Released2021

Specifications

BrandBrontix
ModelBrontix FN-3781 Ultra
Size120 × 120 × 25 mm
Speed400–2,800 RPM (PWM)
Airflow95.2 CFM
Static pressure3.08 mmH₂O
Noise36 dBA
BearingRifle bearing
Connector4-pin PWM
Rated lifetime150,000 hours

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Cite this page: Hardware Spec Index, “Brontix FN-3781 Ultra 120mm PWM Case Fan”, https://vextor7.com/item/83952801 (accessed 2026-10-26).