Hardware Spec Index

Teralux FN-3991 Plus 140mm PWM ARGB Case Fan

Case Fans · Teralux · SKU FN3991-PLUS · Released 2019 · Updated 2026-10-25

Key facts

Benchmark index1,397 (Case Fans scale)
Category rank#22,444
Street price$49
Power2 W
Performance per dollar28.51
Released2019

Specifications

BrandTeralux
ModelTeralux FN-3991 Plus
Size140 × 140 × 25 mm
Speed300–1,400 RPM (PWM)
Airflow67.2 CFM
Static pressure1.33 mmH₂O
Noise35 dBA
BearingFluid dynamic bearing
Connector4-pin PWM + 3-pin 5V ARGB
Rated lifetime150,000 hours

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Cite this page: Hardware Spec Index, “Teralux FN-3991 Plus 140mm PWM ARGB Case Fan”, https://vextor7.com/item/32938592 (accessed 2026-10-25).