Hardware Spec Index

Teralux FN-4257 Ultra 140mm PWM Case Fan

Case Fans · Teralux · SKU FN4257-ULTRA · Released 2020 · Updated 2026-10-24

Key facts

Benchmark index326 (Case Fans scale)
Category rank#42,600
Street price$9
Power3 W
Performance per dollar36.22
Released2020

Specifications

BrandTeralux
ModelTeralux FN-4257 Ultra
Size140 × 140 × 25 mm
Speed400–1,900 RPM (PWM)
Airflow91.2 CFM
Static pressure1.80 mmH₂O
Noise26 dBA
BearingMagnetic levitation
Connector4-pin PWM
Rated lifetime150,000 hours

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Cite this page: Hardware Spec Index, “Teralux FN-4257 Ultra 140mm PWM Case Fan”, https://vextor7.com/item/14844787 (accessed 2026-10-24).