Hardware Spec Index

Caldera FN-3991 Plus 140mm PWM ARGB Case Fan

Case Fans · Caldera · SKU FN3991-PLUS · Released 2020 · Updated 2026-10-20

Key facts

Benchmark index879 (Case Fans scale)
Category rank#14,808
Street price$29
Power4 W
Performance per dollar30.31
Released2020

Specifications

BrandCaldera
ModelCaldera FN-3991 Plus
Size140 × 140 × 25 mm
Speed500–2,700 RPM (PWM)
Airflow129.6 CFM
Static pressure2.56 mmH₂O
Noise36 dBA
BearingFluid dynamic bearing
Connector4-pin PWM + 3-pin 5V ARGB
Rated lifetime100,000 hours

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Cite this page: Hardware Spec Index, “Caldera FN-3991 Plus 140mm PWM ARGB Case Fan”, https://vextor7.com/item/4186344 (accessed 2026-10-20).