Hardware Spec Index

Teralux FN-3940 Ultra 120mm PWM Case Fan

Case Fans · Teralux · SKU FN3940-ULTRA · Released 2020 · Updated 2026-10-23

Key facts

Benchmark index481 (Case Fans scale)
Category rank#28,251
Street price$19
Power3 W
Performance per dollar25.32
Released2020

Specifications

BrandTeralux
ModelTeralux FN-3940 Ultra
Size120 × 120 × 25 mm
Speed300–1,600 RPM (PWM)
Airflow54.4 CFM
Static pressure1.76 mmH₂O
Noise25 dBA
BearingRifle bearing
Connector4-pin PWM
Rated lifetime100,000 hours

Related guides

AIO Liquid Cooling vs Air Cooling for CPUs

Similar Case Fans

ModelBenchmarkPriceCompare
Caldera FN-5419 Prime 120mm PWM Case Fan440$19Compare
Brontix FN-4301 Edge 120mm PWM ARGB Case Fan856$29Compare
Teralux FN-6991 Ti 120mm PWM ARGB Case Fan1,325$49Compare
Teralux FN-2633 Core 140mm PWM Case Fan671$19Compare
Brontix FN-3778 Core 140mm PWM Case Fan554$19Compare
Brontix FN-3164 SE 120mm PWM ARGB Case Fan (3-Pack)1,130$39Compare

All Case Fans · JSON

Cite this page: Hardware Spec Index, “Teralux FN-3940 Ultra 120mm PWM Case Fan”, https://vextor7.com/item/681893 (accessed 2026-10-23).