Hardware Spec Index

Zephyra FN-3978 Ultra 120mm PWM Case Fan

Case Fans · Zephyra · SKU FN3978-ULTRA · Released 2019 · Updated 2026-10-24

Key facts

Benchmark index369 (Case Fans scale)
Category rank#2,865
Street price$9
Power4 W
Performance per dollar41.00
Released2019

Specifications

BrandZephyra
ModelZephyra FN-3978 Ultra
Size120 × 120 × 25 mm
Speed400–2,700 RPM (PWM)
Airflow91.8 CFM
Static pressure2.97 mmH₂O
Noise25 dBA
BearingFluid dynamic bearing
Connector4-pin PWM
Rated lifetime100,000 hours

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Cite this page: Hardware Spec Index, “Zephyra FN-3978 Ultra 120mm PWM Case Fan”, https://vextor7.com/item/9229792 (accessed 2026-10-24).