Hardware Spec Index

Brontix FN-3921 XT 140mm PWM Case Fan

Case Fans · Brontix · SKU FN3921-XT · Released 2020 · Updated 2026-10-24

Key facts

Benchmark index284 (Case Fans scale)
Category rank#16,400
Street price$9
Power3 W
Performance per dollar31.56
Released2020

Specifications

BrandBrontix
ModelBrontix FN-3921 XT
Size140 × 140 × 25 mm
Speed400–1,900 RPM (PWM)
Airflow91.2 CFM
Static pressure1.80 mmH₂O
Noise25 dBA
BearingRifle bearing
Connector4-pin PWM
Rated lifetime50,000 hours

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Cite this page: Hardware Spec Index, “Brontix FN-3921 XT 140mm PWM Case Fan”, https://vextor7.com/item/84894938 (accessed 2026-10-24).