Hardware Spec Index

Caldera FN-3781 Ultra 140mm PWM ARGB Case Fan

Case Fans · Caldera · SKU FN3781-ULTRA · Released 2021 · Updated 2026-10-22

Key facts

Benchmark index1,257 (Case Fans scale)
Category rank#1,766
Street price$49
Power4 W
Performance per dollar25.65
Released2021

Specifications

BrandCaldera
ModelCaldera FN-3781 Ultra
Size140 × 140 × 25 mm
Speed500–2,500 RPM (PWM)
Airflow120.0 CFM
Static pressure2.38 mmH₂O
Noise32 dBA
BearingFluid dynamic bearing
Connector4-pin PWM + 3-pin 5V ARGB
Rated lifetime150,000 hours

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Cite this page: Hardware Spec Index, “Caldera FN-3781 Ultra 140mm PWM ARGB Case Fan”, https://vextor7.com/item/8433692 (accessed 2026-10-22).