Hardware Spec Index

Brontix FN-9891 Ultra 120mm PWM Case Fan

Case Fans · Brontix · SKU FN9891-ULTRA · Released 2024 · Updated 2026-10-26

Key facts

Benchmark index262 (Case Fans scale)
Category rank#31,299
Street price$9
Power3 W
Performance per dollar29.11
Released2024

Specifications

BrandBrontix
ModelBrontix FN-9891 Ultra
Size120 × 120 × 25 mm
Speed300–1,500 RPM (PWM)
Airflow51.0 CFM
Static pressure1.65 mmH₂O
Noise31 dBA
BearingFluid dynamic bearing
Connector4-pin PWM
Rated lifetime100,000 hours

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Cite this page: Hardware Spec Index, “Brontix FN-9891 Ultra 120mm PWM Case Fan”, https://vextor7.com/item/9577771 (accessed 2026-10-26).