Hardware Spec Index

Brontix FN-3994 Ultra 120mm PWM Case Fan

Case Fans · Brontix · SKU FN3994-ULTRA · Released 2025 · Updated 2026-10-26

Key facts

Benchmark index217 (Case Fans scale)
Category rank#35,609
Street price$9
Power3 W
Performance per dollar24.11
Released2025

Specifications

BrandBrontix
ModelBrontix FN-3994 Ultra
Size120 × 120 × 25 mm
Speed300–1,900 RPM (PWM)
Airflow64.6 CFM
Static pressure2.09 mmH₂O
Noise31 dBA
BearingFluid dynamic bearing
Connector4-pin PWM
Rated lifetime50,000 hours

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Cite this page: Hardware Spec Index, “Brontix FN-3994 Ultra 120mm PWM Case Fan”, https://vextor7.com/item/6236302 (accessed 2026-10-26).