Hardware Spec Index

Brontix FN-3991 Plus 140mm PWM ARGB Case Fan (3-Pack)

Case Fans · Brontix · SKU FN3991-PLUS · Released 2020 · Updated 2026-10-23

Key facts

Benchmark index1,400 (Case Fans scale)
Category rank#13,728
Street price$49
Power4 W
Performance per dollar28.57
Released2020

Specifications

BrandBrontix
ModelBrontix FN-3991 Plus
Size140 × 140 × 25 mm
Speed500–2,500 RPM (PWM)
Airflow120.0 CFM
Static pressure2.38 mmH₂O
Noise34 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-3991 Plus 140mm PWM ARGB Case Fan (3-Pack)”, https://vextor7.com/item/98697717 (accessed 2026-10-23).