Hardware Spec Index

Brontix FN-9931 Pro 120mm PWM Case Fan

Case Fans · Brontix · SKU FN9931-PRO · Released 2019 · Updated 2026-10-20

Key facts

Benchmark index304 (Case Fans scale)
Category rank#48,898
Street price$9
Power3 W
Performance per dollar33.78
Released2019

Specifications

BrandBrontix
ModelBrontix FN-9931 Pro
Size120 × 120 × 25 mm
Speed500–2,100 RPM (PWM)
Airflow71.4 CFM
Static pressure2.31 mmH₂O
Noise28 dBA
BearingRifle bearing
Connector4-pin PWM
Rated lifetime150,000 hours

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Cite this page: Hardware Spec Index, “Brontix FN-9931 Pro 120mm PWM Case Fan”, https://vextor7.com/item/744718 (accessed 2026-10-20).