Hardware Spec Index

Zephyra FN-4657 Prime 140mm PWM Case Fan

Case Fans · Zephyra · SKU FN4657-PRIME · Released 2022 · Updated 2026-10-23

Key facts

Benchmark index750 (Case Fans scale)
Category rank#10,035
Street price$19
Power4 W
Performance per dollar39.47
Released2022

Specifications

BrandZephyra
ModelZephyra FN-4657 Prime
Size140 × 140 × 25 mm
Speed500–2,900 RPM (PWM)
Airflow139.2 CFM
Static pressure2.75 mmH₂O
Noise28 dBA
BearingRifle bearing
Connector4-pin PWM
Rated lifetime50,000 hours

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Cite this page: Hardware Spec Index, “Zephyra FN-4657 Prime 140mm PWM Case Fan”, https://vextor7.com/item/5226854 (accessed 2026-10-23).