Hardware Spec Index

Zephyra FN-4640 Ultra 120mm PWM Case Fan

Case Fans · Zephyra · SKU FN4640-ULTRA · Released 2019 · Updated 2026-10-19

Key facts

Benchmark index368 (Case Fans scale)
Category rank#16,612
Street price$9
Power3 W
Performance per dollar40.89
Released2019

Specifications

BrandZephyra
ModelZephyra FN-4640 Ultra
Size120 × 120 × 25 mm
Speed500–1,800 RPM (PWM)
Airflow61.2 CFM
Static pressure1.98 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-4640 Ultra 120mm PWM Case Fan”, https://vextor7.com/item/17569760 (accessed 2026-10-19).