Hardware Spec Index

Caldera FN-5661 Ultra 140mm PWM Case Fan

Case Fans · Caldera · SKU FN5661-ULTRA · Released 2022 · Updated 2026-10-20

Key facts

Benchmark index370 (Case Fans scale)
Category rank#25,468
Street price$9
Power4 W
Performance per dollar41.11
Released2022

Specifications

BrandCaldera
ModelCaldera FN-5661 Ultra
Size140 × 140 × 25 mm
Speed300–2,900 RPM (PWM)
Airflow139.2 CFM
Static pressure2.75 mmH₂O
Noise30 dBA
BearingFluid dynamic bearing
Connector4-pin PWM
Rated lifetime150,000 hours

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Cite this page: Hardware Spec Index, “Caldera FN-5661 Ultra 140mm PWM Case Fan”, https://vextor7.com/item/7084652 (accessed 2026-10-20).