Hardware Spec Index

Zephyra FN-4657 Ultra 140mm PWM Case Fan (3-Pack)

Case Fans · Zephyra · SKU FN4657-ULTRA · Released 2020 · Updated 2026-10-21

Key facts

Benchmark index688 (Case Fans scale)
Category rank#3,513
Street price$19
Power4 W
Performance per dollar36.21
Released2020

Specifications

BrandZephyra
ModelZephyra FN-4657 Ultra
Size140 × 140 × 25 mm
Speed500–2,800 RPM (PWM)
Airflow134.4 CFM
Static pressure2.66 mmH₂O
Noise26 dBA
BearingRifle bearing
Connector4-pin PWM
Rated lifetime150,000 hours

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Cite this page: Hardware Spec Index, “Zephyra FN-4657 Ultra 140mm PWM Case Fan (3-Pack)”, https://vextor7.com/item/1542296 (accessed 2026-10-21).