Hardware Spec Index

Brontix FN-3931 Prime 120mm PWM ARGB Case Fan

Case Fans · Brontix · SKU FN3931-PRIME · Released 2025 · Updated 2026-10-21

Key facts

Benchmark index1,015 (Case Fans scale)
Category rank#31,773
Street price$39
Power4 W
Performance per dollar26.03
Released2025

Specifications

BrandBrontix
ModelBrontix FN-3931 Prime
Size120 × 120 × 25 mm
Speed500–2,900 RPM (PWM)
Airflow98.6 CFM
Static pressure3.19 mmH₂O
Noise34 dBA
BearingFluid dynamic bearing
Connector4-pin PWM + 3-pin 5V ARGB
Rated lifetime100,000 hours

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Cite this page: Hardware Spec Index, “Brontix FN-3931 Prime 120mm PWM ARGB Case Fan”, https://vextor7.com/item/7977170 (accessed 2026-10-21).