Hardware Spec Index

Brontix FN-5851 Ultra 120mm PWM Case Fan (3-Pack)

Case Fans · Brontix · SKU FN5851-ULTRA · Released 2023 · Updated 2026-10-22

Key facts

Benchmark index454 (Case Fans scale)
Category rank#38,639
Street price$19
Power4 W
Performance per dollar23.89
Released2023

Specifications

BrandBrontix
ModelBrontix FN-5851 Ultra
Size120 × 120 × 25 mm
Speed400–2,600 RPM (PWM)
Airflow88.4 CFM
Static pressure2.86 mmH₂O
Noise29 dBA
BearingFluid dynamic bearing
Connector4-pin PWM
Rated lifetime50,000 hours

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Cite this page: Hardware Spec Index, “Brontix FN-5851 Ultra 120mm PWM Case Fan (3-Pack)”, https://vextor7.com/item/8770170 (accessed 2026-10-22).