Hardware Spec Index

Caldera FN-3991 SE 120mm PWM Case Fan (3-Pack)

Case Fans · Caldera · SKU FN3991-SE · Released 2021 · Updated 2026-10-23

Key facts

Benchmark index240 (Case Fans scale)
Category rank#36,222
Street price$9
Power3 W
Performance per dollar26.67
Released2021

Specifications

BrandCaldera
ModelCaldera FN-3991 SE
Size120 × 120 × 25 mm
Speed300–2,200 RPM (PWM)
Airflow74.8 CFM
Static pressure2.42 mmH₂O
Noise23 dBA
BearingMagnetic levitation
Connector4-pin PWM
Rated lifetime50,000 hours

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Cite this page: Hardware Spec Index, “Caldera FN-3991 SE 120mm PWM Case Fan (3-Pack)”, https://vextor7.com/item/91495583 (accessed 2026-10-23).