Hardware Spec Index

Caldera FN-3991 SE 140mm PWM Case Fan

Case Fans · Caldera · SKU FN3991-SE · Released 2023 · Updated 2026-10-25

Key facts

Benchmark index314 (Case Fans scale)
Category rank#17,651
Street price$9
Power2 W
Performance per dollar34.89
Released2023

Specifications

BrandCaldera
ModelCaldera FN-3991 SE
Size140 × 140 × 25 mm
Speed400–1,400 RPM (PWM)
Airflow67.2 CFM
Static pressure1.33 mmH₂O
Noise25 dBA
BearingRifle bearing
Connector4-pin PWM
Rated lifetime100,000 hours

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Cite this page: Hardware Spec Index, “Caldera FN-3991 SE 140mm PWM Case Fan”, https://vextor7.com/item/85544588 (accessed 2026-10-25).