Hardware Spec Index

Brontix FN-3904 Ultra 140mm PWM Case Fan

Case Fans · Brontix · SKU FN3904-ULTRA · Released 2023 · Updated 2026-10-21

Key facts

Benchmark index428 (Case Fans scale)
Category rank#49,603
Street price$9
Power3 W
Performance per dollar47.56
Released2023

Specifications

BrandBrontix
ModelBrontix FN-3904 Ultra
Size140 × 140 × 25 mm
Speed300–1,900 RPM (PWM)
Airflow91.2 CFM
Static pressure1.80 mmH₂O
Noise32 dBA
BearingMagnetic levitation
Connector4-pin PWM
Rated lifetime50,000 hours

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Cite this page: Hardware Spec Index, “Brontix FN-3904 Ultra 140mm PWM Case Fan”, https://vextor7.com/item/4014071 (accessed 2026-10-21).