Hardware Spec Index

Caldera FN-3947 Ultra 140mm PWM Case Fan

Case Fans · Caldera · SKU FN3947-ULTRA · Released 2024 · Updated 2026-10-23

Key facts

Benchmark index246 (Case Fans scale)
Category rank#43,110
Street price$9
Power3 W
Performance per dollar27.33
Released2024

Specifications

BrandCaldera
ModelCaldera FN-3947 Ultra
Size140 × 140 × 25 mm
Speed300–1,900 RPM (PWM)
Airflow91.2 CFM
Static pressure1.80 mmH₂O
Noise34 dBA
BearingRifle bearing
Connector4-pin PWM
Rated lifetime50,000 hours

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Cite this page: Hardware Spec Index, “Caldera FN-3947 Ultra 140mm PWM Case Fan”, https://vextor7.com/item/4938003 (accessed 2026-10-23).