Hardware Spec Index

Zephyra FN-4991 Prime 140mm PWM Case Fan

Case Fans · Zephyra · SKU FN4991-PRIME · Released 2024 · Updated 2026-10-22

Key facts

Benchmark index238 (Case Fans scale)
Category rank#2,091
Street price$9
Power2 W
Performance per dollar26.44
Released2024

Specifications

BrandZephyra
ModelZephyra FN-4991 Prime
Size140 × 140 × 25 mm
Speed500–1,400 RPM (PWM)
Airflow67.2 CFM
Static pressure1.33 mmH₂O
Noise25 dBA
BearingMagnetic levitation
Connector4-pin PWM
Rated lifetime100,000 hours

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Cite this page: Hardware Spec Index, “Zephyra FN-4991 Prime 140mm PWM Case Fan”, https://vextor7.com/item/8230702 (accessed 2026-10-22).