Hardware Spec Index

Zephyra FN-3921 Prime 120mm PWM Case Fan (3-Pack)

Case Fans · Zephyra · SKU FN3921-PRIME · Released 2026 · Updated 2026-10-23

Key facts

Benchmark index390 (Case Fans scale)
Category rank#27,237
Street price$9
Power2 W
Performance per dollar43.33
Released2026

Specifications

BrandZephyra
ModelZephyra FN-3921 Prime
Size120 × 120 × 25 mm
Speed500–1,400 RPM (PWM)
Airflow47.6 CFM
Static pressure1.54 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 Prime 120mm PWM Case Fan (3-Pack)”, https://vextor7.com/item/3280450 (accessed 2026-10-23).