Hardware Spec Index

Caldera FN-6391 Ultra 140mm PWM Case Fan

Case Fans · Caldera · SKU FN6391-ULTRA · Released 2025 · Updated 2026-10-22

Key facts

Benchmark index462 (Case Fans scale)
Category rank#39,050
Street price$19
Power2 W
Performance per dollar24.32
Released2025

Specifications

BrandCaldera
ModelCaldera FN-6391 Ultra
Size140 × 140 × 25 mm
Speed200–1,400 RPM (PWM)
Airflow67.2 CFM
Static pressure1.33 mmH₂O
Noise35 dBA
BearingFluid dynamic bearing
Connector4-pin PWM
Rated lifetime150,000 hours

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Cite this page: Hardware Spec Index, “Caldera FN-6391 Ultra 140mm PWM Case Fan”, https://vextor7.com/item/74898895 (accessed 2026-10-22).