Hardware Spec Index

Zephyra FN-4791 Ultra 140mm PWM Case Fan

Case Fans · Zephyra · SKU FN4791-ULTRA · Released 2021 · Updated 2026-10-21

Key facts

Benchmark index811 (Case Fans scale)
Category rank#14,732
Street price$29
Power3 W
Performance per dollar27.97
Released2021

Specifications

BrandZephyra
ModelZephyra FN-4791 Ultra
Size140 × 140 × 25 mm
Speed200–2,400 RPM (PWM)
Airflow115.2 CFM
Static pressure2.28 mmH₂O
Noise34 dBA
BearingFluid dynamic bearing
Connector4-pin PWM
Rated lifetime100,000 hours

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Cite this page: Hardware Spec Index, “Zephyra FN-4791 Ultra 140mm PWM Case Fan”, https://vextor7.com/item/12438985 (accessed 2026-10-21).