Hardware Spec Index

Brontix FN-4657 Ultra 120mm PWM Case Fan

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

Key facts

Benchmark index730 (Case Fans scale)
Category rank#33,029
Street price$19
Power3 W
Performance per dollar38.42
Released2021

Specifications

BrandBrontix
ModelBrontix FN-4657 Ultra
Size120 × 120 × 25 mm
Speed500–2,200 RPM (PWM)
Airflow74.8 CFM
Static pressure2.42 mmH₂O
Noise33 dBA
BearingRifle bearing
Connector4-pin PWM
Rated lifetime50,000 hours

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Cite this page: Hardware Spec Index, “Brontix FN-4657 Ultra 120mm PWM Case Fan”, https://vextor7.com/item/8204430 (accessed 2026-10-22).