Hardware Spec Index

Teralux FN-3978 Prime 140mm PWM Case Fan

Case Fans · Teralux · SKU FN3978-PRIME · Released 2019 · Updated 2026-10-20

Key facts

Benchmark index266 (Case Fans scale)
Category rank#8,400
Street price$9
Power3 W
Performance per dollar29.56
Released2019

Specifications

BrandTeralux
ModelTeralux FN-3978 Prime
Size140 × 140 × 25 mm
Speed500–1,500 RPM (PWM)
Airflow72.0 CFM
Static pressure1.43 mmH₂O
Noise25 dBA
BearingFluid dynamic bearing
Connector4-pin PWM
Rated lifetime100,000 hours

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Cite this page: Hardware Spec Index, “Teralux FN-3978 Prime 140mm PWM Case Fan”, https://vextor7.com/item/20059840 (accessed 2026-10-20).