Hardware Spec Index

Zephyra FN-5581 Ultra 140mm PWM Case Fan (3-Pack)

Case Fans · Zephyra · SKU FN5581-ULTRA · Released 2025 · Updated 2026-10-24

Key facts

Benchmark index238 (Case Fans scale)
Category rank#29,134
Street price$9
Power3 W
Performance per dollar26.44
Released2025

Specifications

BrandZephyra
ModelZephyra FN-5581 Ultra
Size140 × 140 × 25 mm
Speed500–1,700 RPM (PWM)
Airflow81.6 CFM
Static pressure1.61 mmH₂O
Noise29 dBA
BearingRifle bearing
Connector4-pin PWM
Rated lifetime150,000 hours

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Cite this page: Hardware Spec Index, “Zephyra FN-5581 Ultra 140mm PWM Case Fan (3-Pack)”, https://vextor7.com/item/19832997 (accessed 2026-10-24).