Hardware Spec Index

Zephyra FN-3990 Pro 120mm PWM Case Fan

Case Fans · Zephyra · SKU FN3990-PRO · Released 2020 · Updated 2026-10-24

Key facts

Benchmark index412 (Case Fans scale)
Category rank#14,386
Street price$9
Power3 W
Performance per dollar45.78
Released2020

Specifications

BrandZephyra
ModelZephyra FN-3990 Pro
Size120 × 120 × 25 mm
Speed500–2,200 RPM (PWM)
Airflow74.8 CFM
Static pressure2.42 mmH₂O
Noise31 dBA
BearingRifle bearing
Connector4-pin PWM
Rated lifetime100,000 hours

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Cite this page: Hardware Spec Index, “Zephyra FN-3990 Pro 120mm PWM Case Fan”, https://vextor7.com/item/3775183 (accessed 2026-10-24).