Hardware Spec Index

Brontix FN-6991 Pro 140mm PWM Case Fan

Case Fans · Brontix · SKU FN6991-PRO · Released 2022 · Updated 2026-10-18

Key facts

Benchmark index458 (Case Fans scale)
Category rank#32,093
Street price$19
Power3 W
Performance per dollar24.11
Released2022

Specifications

BrandBrontix
ModelBrontix FN-6991 Pro
Size140 × 140 × 25 mm
Speed200–2,000 RPM (PWM)
Airflow96.0 CFM
Static pressure1.90 mmH₂O
Noise32 dBA
BearingFluid dynamic bearing
Connector4-pin PWM
Rated lifetime100,000 hours

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Cite this page: Hardware Spec Index, “Brontix FN-6991 Pro 140mm PWM Case Fan”, https://vextor7.com/item/17543168 (accessed 2026-10-18).