Hardware Spec Index

Brontix FN-3681 Ultra 140mm PWM ARGB Case Fan

Case Fans · Brontix · SKU FN3681-ULTRA · Released 2023 · Updated 2026-10-25

Key facts

Benchmark index1,154 (Case Fans scale)
Category rank#32,775
Street price$39
Power3 W
Performance per dollar29.59
Released2023

Specifications

BrandBrontix
ModelBrontix FN-3681 Ultra
Size140 × 140 × 25 mm
Speed200–2,000 RPM (PWM)
Airflow96.0 CFM
Static pressure1.90 mmH₂O
Noise29 dBA
BearingFluid dynamic bearing
Connector4-pin PWM + 3-pin 5V ARGB
Rated lifetime50,000 hours

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Cite this page: Hardware Spec Index, “Brontix FN-3681 Ultra 140mm PWM ARGB Case Fan”, https://vextor7.com/item/82326350 (accessed 2026-10-25).