Hardware Spec Index

Zephyra FN-6640 Ultra 140mm PWM Case Fan

Case Fans · Zephyra · SKU FN6640-ULTRA · Released 2021 · Updated 2026-10-24

Key facts

Benchmark index370 (Case Fans scale)
Category rank#38,746
Street price$19
Power4 W
Performance per dollar19.47
Released2021

Specifications

BrandZephyra
ModelZephyra FN-6640 Ultra
Size140 × 140 × 25 mm
Speed300–2,900 RPM (PWM)
Airflow139.2 CFM
Static pressure2.75 mmH₂O
Noise27 dBA
BearingFluid dynamic bearing
Connector4-pin PWM
Rated lifetime100,000 hours

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Cite this page: Hardware Spec Index, “Zephyra FN-6640 Ultra 140mm PWM Case Fan”, https://vextor7.com/item/15533908 (accessed 2026-10-24).