Hardware Spec Index

Brontix FN-4991 Ultra 120mm PWM ARGB Case Fan

Case Fans · Brontix · SKU FN4991-ULTRA · Released 2019 · Updated 2026-10-21

Key facts

Benchmark index1,104 (Case Fans scale)
Category rank#20,317
Street price$39
Power4 W
Performance per dollar28.31
Released2019

Specifications

BrandBrontix
ModelBrontix FN-4991 Ultra
Size120 × 120 × 25 mm
Speed500–2,700 RPM (PWM)
Airflow91.8 CFM
Static pressure2.97 mmH₂O
Noise30 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-4991 Ultra 120mm PWM ARGB Case Fan”, https://vextor7.com/item/85534362 (accessed 2026-10-21).