Hardware Spec Index

Caldera FN-3781 Ultra 140mm PWM Case Fan

Case Fans · Caldera · SKU FN3781-ULTRA · Released 2025 · Updated 2026-10-21

Key facts

Benchmark index342 (Case Fans scale)
Category rank#46,273
Street price$9
Power3 W
Performance per dollar38.00
Released2025

Specifications

BrandCaldera
ModelCaldera FN-3781 Ultra
Size140 × 140 × 25 mm
Speed400–2,400 RPM (PWM)
Airflow115.2 CFM
Static pressure2.28 mmH₂O
Noise30 dBA
BearingMagnetic levitation
Connector4-pin PWM
Rated lifetime50,000 hours

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Cite this page: Hardware Spec Index, “Caldera FN-3781 Ultra 140mm PWM Case Fan”, https://vextor7.com/item/6786233 (accessed 2026-10-21).