Hardware Spec Index

Zephyra FN-3991 SE 140mm PWM ARGB Case Fan

Case Fans · Zephyra · SKU FN3991-SE · Released 2025 · Updated 2026-10-24

Key facts

Benchmark index776 (Case Fans scale)
Category rank#9,611
Street price$29
Power4 W
Performance per dollar26.76
Released2025

Specifications

BrandZephyra
ModelZephyra FN-3991 SE
Size140 × 140 × 25 mm
Speed200–2,800 RPM (PWM)
Airflow134.4 CFM
Static pressure2.66 mmH₂O
Noise27 dBA
BearingMagnetic levitation
Connector4-pin PWM + 3-pin 5V ARGB
Rated lifetime50,000 hours

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Cite this page: Hardware Spec Index, “Zephyra FN-3991 SE 140mm PWM ARGB Case Fan”, https://vextor7.com/item/6340829 (accessed 2026-10-24).