Hardware Spec Index

Brontix FN-4657 Ultra 140mm PWM Case Fan

Case Fans · Brontix · SKU FN4657-ULTRA · Released 2021 · Updated 2026-10-22

Key facts

Benchmark index286 (Case Fans scale)
Category rank#29,178
Street price$9
Power2 W
Performance per dollar31.78
Released2021

Specifications

BrandBrontix
ModelBrontix FN-4657 Ultra
Size140 × 140 × 25 mm
Speed400–1,400 RPM (PWM)
Airflow67.2 CFM
Static pressure1.33 mmH₂O
Noise36 dBA
BearingRifle bearing
Connector4-pin PWM
Rated lifetime50,000 hours

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Cite this page: Hardware Spec Index, “Brontix FN-4657 Ultra 140mm PWM Case Fan”, https://vextor7.com/item/1920169 (accessed 2026-10-22).