Hardware Spec Index

Brontix FN-4857 Prime 140mm PWM Case Fan

Case Fans · Brontix · SKU FN4857-PRIME · Released 2020 · Updated 2026-10-21

Key facts

Benchmark index495 (Case Fans scale)
Category rank#13,437
Street price$19
Power3 W
Performance per dollar26.05
Released2020

Specifications

BrandBrontix
ModelBrontix FN-4857 Prime
Size140 × 140 × 25 mm
Speed200–1,700 RPM (PWM)
Airflow81.6 CFM
Static pressure1.61 mmH₂O
Noise24 dBA
BearingRifle bearing
Connector4-pin PWM
Rated lifetime50,000 hours

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Cite this page: Hardware Spec Index, “Brontix FN-4857 Prime 140mm PWM Case Fan”, https://vextor7.com/item/11005690 (accessed 2026-10-21).