Hardware Spec Index

Brontix FN-3665 Ultra 120mm PWM ARGB Case Fan

Case Fans · Brontix · SKU FN3665-ULTRA · Released 2021 · Updated 2026-10-22

Key facts

Benchmark index1,161 (Case Fans scale)
Category rank#24,013
Street price$39
Power3 W
Performance per dollar29.77
Released2021

Specifications

BrandBrontix
ModelBrontix FN-3665 Ultra
Size120 × 120 × 25 mm
Speed200–1,500 RPM (PWM)
Airflow51.0 CFM
Static pressure1.65 mmH₂O
Noise25 dBA
BearingRifle bearing
Connector4-pin PWM + 3-pin 5V ARGB
Rated lifetime100,000 hours

Related guides

AIO Liquid Cooling vs Air Cooling for CPUs

Similar Case Fans

ModelBenchmarkPriceCompare
Zephyra FN-8040 Max 140mm PWM Case Fan748$19Compare
Zephyra FN-7265 Prime 120mm PWM ARGB Case Fan1,275$49Compare
Zephyra FN-9664 SE 120mm PWM Case Fan626$19Compare
Teralux FN-6776 Pro 120mm PWM Case Fan442$19Compare
Zephyra FN-9184 Ti 120mm PWM ARGB Case Fan1,222$39Compare
Corvane FN-4284 Plus 120mm PWM ARGB Case Fan921$29Compare

All Case Fans · JSON

Cite this page: Hardware Spec Index, “Brontix FN-3665 Ultra 120mm PWM ARGB Case Fan”, https://vextor7.com/item/13660950 (accessed 2026-10-22).