Hardware Spec Index

Caldera FN-3991 Pro 140mm PWM Case Fan (3-Pack)

Case Fans · Caldera · SKU FN3991-PRO · Released 2024 · Updated 2026-10-20

Key facts

Benchmark index606 (Case Fans scale)
Category rank#25,793
Street price$19
Power3 W
Performance per dollar31.89
Released2024

Specifications

BrandCaldera
ModelCaldera FN-3991 Pro
Size140 × 140 × 25 mm
Speed500–2,300 RPM (PWM)
Airflow110.4 CFM
Static pressure2.19 mmH₂O
Noise25 dBA
BearingRifle bearing
Connector4-pin PWM
Rated lifetime50,000 hours

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Cite this page: Hardware Spec Index, “Caldera FN-3991 Pro 140mm PWM Case Fan (3-Pack)”, https://vextor7.com/item/7983115 (accessed 2026-10-20).