Hardware Spec Index

Brontix FN-9921 Ultra 140mm PWM Case Fan

Case Fans · Brontix · SKU FN9921-ULTRA · Released 2026 · Updated 2026-10-25

Key facts

Benchmark index791 (Case Fans scale)
Category rank#35,674
Street price$19
Power4 W
Performance per dollar41.63
Released2026

Specifications

BrandBrontix
ModelBrontix FN-9921 Ultra
Size140 × 140 × 25 mm
Speed400–2,700 RPM (PWM)
Airflow129.6 CFM
Static pressure2.56 mmH₂O
Noise26 dBA
BearingFluid dynamic bearing
Connector4-pin PWM
Rated lifetime50,000 hours

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Cite this page: Hardware Spec Index, “Brontix FN-9921 Ultra 140mm PWM Case Fan”, https://vextor7.com/item/6083328 (accessed 2026-10-25).