Hardware Spec Index

Zephyra FN-3657 Ultra 140mm PWM ARGB Case Fan

Case Fans · Zephyra · SKU FN3657-ULTRA · Released 2023 · Updated 2026-10-20

Key facts

Benchmark index1,295 (Case Fans scale)
Category rank#9,192
Street price$39
Power3 W
Performance per dollar33.21
Released2023

Specifications

BrandZephyra
ModelZephyra FN-3657 Ultra
Size140 × 140 × 25 mm
Speed400–2,000 RPM (PWM)
Airflow96.0 CFM
Static pressure1.90 mmH₂O
Noise25 dBA
BearingMagnetic levitation
Connector4-pin PWM + 3-pin 5V ARGB
Rated lifetime100,000 hours

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Cite this page: Hardware Spec Index, “Zephyra FN-3657 Ultra 140mm PWM ARGB Case Fan”, https://vextor7.com/item/6301975 (accessed 2026-10-20).