Hardware Spec Index

Caldera FN-4391 Ultra 120mm PWM Case Fan

Case Fans · Caldera · SKU FN4391-ULTRA · Released 2023 · Updated 2026-10-22

Key facts

Benchmark index307 (Case Fans scale)
Category rank#27,955
Street price$9
Power3 W
Performance per dollar34.11
Released2023

Specifications

BrandCaldera
ModelCaldera FN-4391 Ultra
Size120 × 120 × 25 mm
Speed200–2,300 RPM (PWM)
Airflow78.2 CFM
Static pressure2.53 mmH₂O
Noise33 dBA
BearingFluid dynamic bearing
Connector4-pin PWM
Rated lifetime150,000 hours

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Cite this page: Hardware Spec Index, “Caldera FN-4391 Ultra 120mm PWM Case Fan”, https://vextor7.com/item/177422 (accessed 2026-10-22).