Hardware Spec Index

Brontix FN-3981 Ultra 120mm PWM Case Fan

Case Fans · Brontix · SKU FN3981-ULTRA · Released 2026 · Updated 2026-10-24

Key facts

Benchmark index601 (Case Fans scale)
Category rank#34,389
Street price$19
Power4 W
Performance per dollar31.63
Released2026

Specifications

BrandBrontix
ModelBrontix FN-3981 Ultra
Size120 × 120 × 25 mm
Speed300–2,700 RPM (PWM)
Airflow91.8 CFM
Static pressure2.97 mmH₂O
Noise33 dBA
BearingMagnetic levitation
Connector4-pin PWM
Rated lifetime50,000 hours

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Cite this page: Hardware Spec Index, “Brontix FN-3981 Ultra 120mm PWM Case Fan”, https://vextor7.com/item/41360666 (accessed 2026-10-24).