Hardware Spec Index

Brontix FN-3990 Prime 140mm PWM Case Fan

Case Fans · Brontix · SKU FN3990-PRIME · Released 2021 · Updated 2026-10-22

Key facts

Benchmark index485 (Case Fans scale)
Category rank#167
Street price$19
Power2 W
Performance per dollar25.53
Released2021

Specifications

BrandBrontix
ModelBrontix FN-3990 Prime
Size140 × 140 × 25 mm
Speed500–1,400 RPM (PWM)
Airflow67.2 CFM
Static pressure1.33 mmH₂O
Noise27 dBA
BearingMagnetic levitation
Connector4-pin PWM
Rated lifetime50,000 hours

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Cite this page: Hardware Spec Index, “Brontix FN-3990 Prime 140mm PWM Case Fan”, https://vextor7.com/item/384877 (accessed 2026-10-22).