Hardware Spec Index

Zephyra FN-3921 Plus 140mm PWM Case Fan

Case Fans · Zephyra · SKU FN3921-PLUS · Released 2019 · Updated 2026-10-26

Key facts

Benchmark index823 (Case Fans scale)
Category rank#11,050
Street price$29
Power4 W
Performance per dollar28.38
Released2019

Specifications

BrandZephyra
ModelZephyra FN-3921 Plus
Size140 × 140 × 25 mm
Speed300–2,900 RPM (PWM)
Airflow139.2 CFM
Static pressure2.75 mmH₂O
Noise33 dBA
BearingMagnetic levitation
Connector4-pin PWM
Rated lifetime100,000 hours

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Cite this page: Hardware Spec Index, “Zephyra FN-3921 Plus 140mm PWM Case Fan”, https://vextor7.com/item/22550315 (accessed 2026-10-26).