Hardware Spec Index

Teralux FN-4991 Pro 140mm PWM Case Fan (3-Pack)

Case Fans · Teralux · SKU FN4991-PRO · Released 2023 · Updated 2026-10-20

Key facts

Benchmark index262 (Case Fans scale)
Category rank#20,319
Street price$9
Power4 W
Performance per dollar29.11
Released2023

Specifications

BrandTeralux
ModelTeralux FN-4991 Pro
Size140 × 140 × 25 mm
Speed500–2,500 RPM (PWM)
Airflow120.0 CFM
Static pressure2.38 mmH₂O
Noise32 dBA
BearingFluid dynamic bearing
Connector4-pin PWM
Rated lifetime100,000 hours

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Cite this page: Hardware Spec Index, “Teralux FN-4991 Pro 140mm PWM Case Fan (3-Pack)”, https://vextor7.com/item/5454977 (accessed 2026-10-20).