Hardware Spec Index

Zephyra FN-3857 Prime 140mm PWM Case Fan (3-Pack)

Case Fans · Zephyra · SKU FN3857-PRIME · Released 2022 · Updated 2026-10-25

Key facts

Benchmark index551 (Case Fans scale)
Category rank#2,941
Street price$19
Power4 W
Performance per dollar29.00
Released2022

Specifications

BrandZephyra
ModelZephyra FN-3857 Prime
Size140 × 140 × 25 mm
Speed200–2,500 RPM (PWM)
Airflow120.0 CFM
Static pressure2.38 mmH₂O
Noise36 dBA
BearingMagnetic levitation
Connector4-pin PWM
Rated lifetime50,000 hours

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Cite this page: Hardware Spec Index, “Zephyra FN-3857 Prime 140mm PWM Case Fan (3-Pack)”, https://vextor7.com/item/46062943 (accessed 2026-10-25).