Hardware Spec Index

Brontix FN-5581 Ultra 140mm PWM Case Fan

Case Fans · Brontix · SKU FN5581-ULTRA · Released 2022 · Updated 2026-10-25

Key facts

Benchmark index369 (Case Fans scale)
Category rank#29,970
Street price$9
Power3 W
Performance per dollar41.00
Released2022

Specifications

BrandBrontix
ModelBrontix FN-5581 Ultra
Size140 × 140 × 25 mm
Speed400–2,100 RPM (PWM)
Airflow100.8 CFM
Static pressure2.00 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-5581 Ultra 140mm PWM Case Fan”, https://vextor7.com/item/85543171 (accessed 2026-10-25).