Hardware Spec Index

Caldera FN-6521 Ultra 140mm PWM Case Fan (3-Pack)

Case Fans · Caldera · SKU FN6521-ULTRA · Released 2021 · Updated 2026-10-25

Key facts

Benchmark index378 (Case Fans scale)
Category rank#47,993
Street price$9
Power3 W
Performance per dollar42.00
Released2021

Specifications

BrandCaldera
ModelCaldera FN-6521 Ultra
Size140 × 140 × 25 mm
Speed200–1,700 RPM (PWM)
Airflow81.6 CFM
Static pressure1.61 mmH₂O
Noise33 dBA
BearingFluid dynamic bearing
Connector4-pin PWM
Rated lifetime100,000 hours

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Cite this page: Hardware Spec Index, “Caldera FN-6521 Ultra 140mm PWM Case Fan (3-Pack)”, https://vextor7.com/item/11985372 (accessed 2026-10-25).