Hardware Spec Index

Brontix FN-4939 Pro 120mm PWM Case Fan (3-Pack)

Case Fans · Brontix · SKU FN4939-PRO · Released 2020 · Updated 2026-10-22

Key facts

Benchmark index558 (Case Fans scale)
Category rank#24,534
Street price$19
Power4 W
Performance per dollar29.37
Released2020

Specifications

BrandBrontix
ModelBrontix FN-4939 Pro
Size120 × 120 × 25 mm
Speed400–2,500 RPM (PWM)
Airflow85.0 CFM
Static pressure2.75 mmH₂O
Noise36 dBA
BearingMagnetic levitation
Connector4-pin PWM
Rated lifetime100,000 hours

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Cite this page: Hardware Spec Index, “Brontix FN-4939 Pro 120mm PWM Case Fan (3-Pack)”, https://vextor7.com/item/9682665 (accessed 2026-10-22).