Hardware Spec Index

Zephyra FN-4491 Ultra 140mm PWM Case Fan

Case Fans · Zephyra · SKU FN4491-ULTRA · Released 2021 · Updated 2026-10-22

Key facts

Benchmark index755 (Case Fans scale)
Category rank#48,619
Street price$29
Power4 W
Performance per dollar26.03
Released2021

Specifications

BrandZephyra
ModelZephyra FN-4491 Ultra
Size140 × 140 × 25 mm
Speed300–3,000 RPM (PWM)
Airflow144.0 CFM
Static pressure2.85 mmH₂O
Noise28 dBA
BearingFluid dynamic bearing
Connector4-pin PWM
Rated lifetime50,000 hours

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Cite this page: Hardware Spec Index, “Zephyra FN-4491 Ultra 140mm PWM Case Fan”, https://vextor7.com/item/7255175 (accessed 2026-10-22).