Hardware Spec Index

Caldera FN-3991 Max 120mm PWM Case Fan

Case Fans · Caldera · SKU FN3991-MAX · Released 2023 · Updated 2026-10-23

Key facts

Benchmark index237 (Case Fans scale)
Category rank#32,834
Street price$9
Power4 W
Performance per dollar26.33
Released2023

Specifications

BrandCaldera
ModelCaldera FN-3991 Max
Size120 × 120 × 25 mm
Speed300–2,800 RPM (PWM)
Airflow95.2 CFM
Static pressure3.08 mmH₂O
Noise29 dBA
BearingFluid dynamic bearing
Connector4-pin PWM
Rated lifetime100,000 hours

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Cite this page: Hardware Spec Index, “Caldera FN-3991 Max 120mm PWM Case Fan”, https://vextor7.com/item/7187009 (accessed 2026-10-23).