Hardware Spec Index

Brontix FN-3978 Prime 140mm PWM Case Fan

Case Fans · Brontix · SKU FN3978-PRIME · Released 2026 · Updated 2026-10-25

Key facts

Benchmark index401 (Case Fans scale)
Category rank#32,358
Street price$9
Power4 W
Performance per dollar44.56
Released2026

Specifications

BrandBrontix
ModelBrontix FN-3978 Prime
Size140 × 140 × 25 mm
Speed400–2,500 RPM (PWM)
Airflow120.0 CFM
Static pressure2.38 mmH₂O
Noise29 dBA
BearingRifle bearing
Connector4-pin PWM
Rated lifetime100,000 hours

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Cite this page: Hardware Spec Index, “Brontix FN-3978 Prime 140mm PWM Case Fan”, https://vextor7.com/item/6989629 (accessed 2026-10-25).