Hardware Spec Index

Zephyra FN-3977 Prime 120mm PWM Case Fan

Case Fans · Zephyra · SKU FN3977-PRIME · Released 2020 · Updated 2026-10-23

Key facts

Benchmark index448 (Case Fans scale)
Category rank#5,331
Street price$9
Power2 W
Performance per dollar49.78
Released2020

Specifications

BrandZephyra
ModelZephyra FN-3977 Prime
Size120 × 120 × 25 mm
Speed400–1,400 RPM (PWM)
Airflow47.6 CFM
Static pressure1.54 mmH₂O
Noise36 dBA
BearingFluid dynamic bearing
Connector4-pin PWM
Rated lifetime100,000 hours

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Cite this page: Hardware Spec Index, “Zephyra FN-3977 Prime 120mm PWM Case Fan”, https://vextor7.com/item/36020357 (accessed 2026-10-23).