Hardware Spec Index

Brontix FN-3978 Ultra 140mm PWM Case Fan

Case Fans · Brontix · SKU FN3978-ULTRA · Released 2021 · Updated 2026-10-21

Key facts

Benchmark index505 (Case Fans scale)
Category rank#27,234
Street price$19
Power3 W
Performance per dollar26.58
Released2021

Specifications

BrandBrontix
ModelBrontix FN-3978 Ultra
Size140 × 140 × 25 mm
Speed200–2,000 RPM (PWM)
Airflow96.0 CFM
Static pressure1.90 mmH₂O
Noise34 dBA
BearingRifle bearing
Connector4-pin PWM
Rated lifetime100,000 hours

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Cite this page: Hardware Spec Index, “Brontix FN-3978 Ultra 140mm PWM Case Fan”, https://vextor7.com/item/21365942 (accessed 2026-10-21).