Hardware Spec Index

Brontix FN-3949 Ultra 120mm PWM Case Fan

Case Fans · Brontix · SKU FN3949-ULTRA · Released 2025 · Updated 2026-10-22

Key facts

Benchmark index204 (Case Fans scale)
Category rank#10,142
Street price$9
Power4 W
Performance per dollar22.67
Released2025

Specifications

BrandBrontix
ModelBrontix FN-3949 Ultra
Size120 × 120 × 25 mm
Speed300–2,800 RPM (PWM)
Airflow95.2 CFM
Static pressure3.08 mmH₂O
Noise35 dBA
BearingMagnetic levitation
Connector4-pin PWM
Rated lifetime100,000 hours

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Cite this page: Hardware Spec Index, “Brontix FN-3949 Ultra 120mm PWM Case Fan”, https://vextor7.com/item/17328678 (accessed 2026-10-22).