Hardware Spec Index

Caldera FN-3978 Ultra 140mm PWM Case Fan (3-Pack)

Case Fans · Caldera · SKU FN3978-ULTRA · Released 2025 · Updated 2026-10-25

Key facts

Benchmark index628 (Case Fans scale)
Category rank#15,883
Street price$19
Power3 W
Performance per dollar33.05
Released2025

Specifications

BrandCaldera
ModelCaldera FN-3978 Ultra
Size140 × 140 × 25 mm
Speed300–2,400 RPM (PWM)
Airflow115.2 CFM
Static pressure2.28 mmH₂O
Noise29 dBA
BearingFluid dynamic bearing
Connector4-pin PWM
Rated lifetime150,000 hours

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Cite this page: Hardware Spec Index, “Caldera FN-3978 Ultra 140mm PWM Case Fan (3-Pack)”, https://vextor7.com/item/86527218 (accessed 2026-10-25).