Hardware Spec Index

Brontix FN-4991 Ultra 140mm PWM ARGB Case Fan (3-Pack)

Case Fans · Brontix · SKU FN4991-ULTRA · Released 2019 · Updated 2026-10-25

Key facts

Benchmark index1,181 (Case Fans scale)
Category rank#17,460
Street price$39
Power3 W
Performance per dollar30.28
Released2019

Specifications

BrandBrontix
ModelBrontix FN-4991 Ultra
Size140 × 140 × 25 mm
Speed300–2,000 RPM (PWM)
Airflow96.0 CFM
Static pressure1.90 mmH₂O
Noise24 dBA
BearingFluid dynamic bearing
Connector4-pin PWM + 3-pin 5V ARGB
Rated lifetime150,000 hours

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Cite this page: Hardware Spec Index, “Brontix FN-4991 Ultra 140mm PWM ARGB Case Fan (3-Pack)”, https://vextor7.com/item/76987620 (accessed 2026-10-25).