Hardware Spec Index

Brontix FN-3984 Ultra 120mm PWM Case Fan

Case Fans · Brontix · SKU FN3984-ULTRA · Released 2023 · Updated 2026-10-19

Key facts

Benchmark index229 (Case Fans scale)
Category rank#3,269
Street price$9
Power4 W
Performance per dollar25.44
Released2023

Specifications

BrandBrontix
ModelBrontix FN-3984 Ultra
Size120 × 120 × 25 mm
Speed400–2,700 RPM (PWM)
Airflow91.8 CFM
Static pressure2.97 mmH₂O
Noise22 dBA
BearingMagnetic levitation
Connector4-pin PWM
Rated lifetime150,000 hours

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Cite this page: Hardware Spec Index, “Brontix FN-3984 Ultra 120mm PWM Case Fan”, https://vextor7.com/item/975206 (accessed 2026-10-19).