Hardware Spec Index

Brontix FN-4121 Pro 120mm PWM Case Fan

Case Fans · Brontix · SKU FN4121-PRO · Released 2025 · Updated 2026-10-22

Key facts

Benchmark index315 (Case Fans scale)
Category rank#15,512
Street price$9
Power3 W
Performance per dollar35.00
Released2025

Specifications

BrandBrontix
ModelBrontix FN-4121 Pro
Size120 × 120 × 25 mm
Speed400–1,500 RPM (PWM)
Airflow51.0 CFM
Static pressure1.65 mmH₂O
Noise33 dBA
BearingFluid dynamic bearing
Connector4-pin PWM
Rated lifetime100,000 hours

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Cite this page: Hardware Spec Index, “Brontix FN-4121 Pro 120mm PWM Case Fan”, https://vextor7.com/item/4732291 (accessed 2026-10-22).