Hardware Spec Index

Teralux FN-3991 Plus 140mm PWM Case Fan

Case Fans · Teralux · SKU FN3991-PLUS · Released 2025 · Updated 2026-10-19

Key facts

Benchmark index757 (Case Fans scale)
Category rank#41,646
Street price$19
Power3 W
Performance per dollar39.84
Released2025

Specifications

BrandTeralux
ModelTeralux FN-3991 Plus
Size140 × 140 × 25 mm
Speed500–2,200 RPM (PWM)
Airflow105.6 CFM
Static pressure2.09 mmH₂O
Noise30 dBA
BearingFluid dynamic bearing
Connector4-pin PWM
Rated lifetime50,000 hours

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Cite this page: Hardware Spec Index, “Teralux FN-3991 Plus 140mm PWM Case Fan”, https://vextor7.com/item/18219081 (accessed 2026-10-19).