Hardware Spec Index

Brontix FN-3940 Pro 120mm PWM ARGB Case Fan

Case Fans · Brontix · SKU FN3940-PRO · Released 2022 · Updated 2026-10-20

Key facts

Benchmark index1,067 (Case Fans scale)
Category rank#33,429
Street price$39
Power3 W
Performance per dollar27.36
Released2022

Specifications

BrandBrontix
ModelBrontix FN-3940 Pro
Size120 × 120 × 25 mm
Speed400–2,100 RPM (PWM)
Airflow71.4 CFM
Static pressure2.31 mmH₂O
Noise22 dBA
BearingFluid dynamic bearing
Connector4-pin PWM + 3-pin 5V ARGB
Rated lifetime50,000 hours

Related guides

AIO Liquid Cooling vs Air Cooling for CPUs

Similar Case Fans

ModelBenchmarkPriceCompare
Zephyra FN-2561 Ultra 140mm PWM Case Fan827$29Compare
Corvane FN-9479 Ultra 140mm PWM ARGB Case Fan937$39Compare
Zephyra FN-4512 XT 140mm PWM Case Fan623$19Compare
Caldera FN-9146 Pro 120mm PWM Case Fan614$19Compare
Corvane FN-6985 Edge 140mm PWM Case Fan407$9Compare
Zephyra FN-6134 Plus 120mm PWM Case Fan471$19Compare

All Case Fans · JSON

Cite this page: Hardware Spec Index, “Brontix FN-3940 Pro 120mm PWM ARGB Case Fan”, https://vextor7.com/item/221107 (accessed 2026-10-20).