Hardware Spec Index

Zephyra FN-3971 Ultra 140mm PWM Case Fan

Case Fans · Zephyra · SKU FN3971-ULTRA · Released 2025 · Updated 2026-10-22

Key facts

Benchmark index490 (Case Fans scale)
Category rank#36,891
Street price$19
Power4 W
Performance per dollar25.79
Released2025

Specifications

BrandZephyra
ModelZephyra FN-3971 Ultra
Size140 × 140 × 25 mm
Speed500–2,500 RPM (PWM)
Airflow120.0 CFM
Static pressure2.38 mmH₂O
Noise33 dBA
BearingMagnetic levitation
Connector4-pin PWM
Rated lifetime50,000 hours

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Cite this page: Hardware Spec Index, “Zephyra FN-3971 Ultra 140mm PWM Case Fan”, https://vextor7.com/item/31312882 (accessed 2026-10-22).