Hardware Spec Index

Teralux FN-3821 Ultra 120mm PWM ARGB Case Fan

Case Fans · Teralux · SKU FN3821-ULTRA · Released 2020 · Updated 2026-10-19

Key facts

Benchmark index1,126 (Case Fans scale)
Category rank#38,610
Street price$39
Power4 W
Performance per dollar28.87
Released2020

Specifications

BrandTeralux
ModelTeralux FN-3821 Ultra
Size120 × 120 × 25 mm
Speed400–2,700 RPM (PWM)
Airflow91.8 CFM
Static pressure2.97 mmH₂O
Noise31 dBA
BearingFluid dynamic 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-8103 XT 120mm PWM Case Fan447$19Compare
Teralux FN-8973 Pro 120mm PWM Case Fan443$19Compare
Zephyra FN-3625 Ultra 120mm PWM Case Fan505$19Compare
Caldera FN-5743 SE 140mm PWM ARGB Case Fan787$29Compare
Caldera FN-8243 Pro 120mm PWM Case Fan580$19Compare
Caldera FN-6271 Prime 140mm PWM ARGB Case Fan1,214$39Compare

All Case Fans · JSON

Cite this page: Hardware Spec Index, “Teralux FN-3821 Ultra 120mm PWM ARGB Case Fan”, https://vextor7.com/item/254221 (accessed 2026-10-19).