Hardware Spec Index

Caldera FN-4257 Ultra 140mm PWM Case Fan

Case Fans · Caldera · SKU FN4257-ULTRA · Released 2022 · Updated 2026-10-19

Key facts

Benchmark index281 (Case Fans scale)
Category rank#9,890
Street price$9
Power4 W
Performance per dollar31.22
Released2022

Specifications

BrandCaldera
ModelCaldera FN-4257 Ultra
Size140 × 140 × 25 mm
Speed500–2,900 RPM (PWM)
Airflow139.2 CFM
Static pressure2.75 mmH₂O
Noise34 dBA
BearingMagnetic levitation
Connector4-pin PWM
Rated lifetime100,000 hours

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Cite this page: Hardware Spec Index, “Caldera FN-4257 Ultra 140mm PWM Case Fan”, https://vextor7.com/item/17094792 (accessed 2026-10-19).