Hardware Spec Index

Brontix FN-3847 Ultra 120mm PWM Case Fan

Case Fans · Brontix · SKU FN3847-ULTRA · Released 2024 · Updated 2026-10-25

Key facts

Benchmark index283 (Case Fans scale)
Category rank#5,273
Street price$9
Power3 W
Performance per dollar31.44
Released2024

Specifications

BrandBrontix
ModelBrontix FN-3847 Ultra
Size120 × 120 × 25 mm
Speed400–2,100 RPM (PWM)
Airflow71.4 CFM
Static pressure2.31 mmH₂O
Noise22 dBA
BearingRifle bearing
Connector4-pin PWM
Rated lifetime150,000 hours

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Cite this page: Hardware Spec Index, “Brontix FN-3847 Ultra 120mm PWM Case Fan”, https://vextor7.com/item/7842424 (accessed 2026-10-25).