Hardware Spec Index

Brontix FN-9840 Ultra 140mm PWM ARGB Case Fan

Case Fans · Brontix · SKU FN9840-ULTRA · Released 2024 · Updated 2026-10-21

Key facts

Benchmark index795 (Case Fans scale)
Category rank#42,266
Street price$29
Power3 W
Performance per dollar27.41
Released2024

Specifications

BrandBrontix
ModelBrontix FN-9840 Ultra
Size140 × 140 × 25 mm
Speed500–2,300 RPM (PWM)
Airflow110.4 CFM
Static pressure2.19 mmH₂O
Noise26 dBA
BearingMagnetic levitation
Connector4-pin PWM + 3-pin 5V ARGB
Rated lifetime50,000 hours

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Cite this page: Hardware Spec Index, “Brontix FN-9840 Ultra 140mm PWM ARGB Case Fan”, https://vextor7.com/item/4521385 (accessed 2026-10-21).