Hardware Spec Index

Brontix FN-3691 Ultra 140mm PWM ARGB Case Fan

Case Fans · Brontix · SKU FN3691-ULTRA · Released 2023 · Updated 2026-10-24

Key facts

Benchmark index1,119 (Case Fans scale)
Category rank#5,041
Street price$39
Power3 W
Performance per dollar28.69
Released2023

Specifications

BrandBrontix
ModelBrontix FN-3691 Ultra
Size140 × 140 × 25 mm
Speed400–2,100 RPM (PWM)
Airflow100.8 CFM
Static pressure2.00 mmH₂O
Noise26 dBA
BearingFluid dynamic bearing
Connector4-pin PWM + 3-pin 5V ARGB
Rated lifetime150,000 hours

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Cite this page: Hardware Spec Index, “Brontix FN-3691 Ultra 140mm PWM ARGB Case Fan”, https://vextor7.com/item/29139510 (accessed 2026-10-24).