Hardware Spec Index

Teralux FN-3921 Ultra 140mm PWM Case Fan (3-Pack)

Case Fans · Teralux · SKU FN3921-ULTRA · Released 2026 · Updated 2026-10-26

Key facts

Benchmark index637 (Case Fans scale)
Category rank#41,458
Street price$19
Power4 W
Performance per dollar33.53
Released2026

Specifications

BrandTeralux
ModelTeralux FN-3921 Ultra
Size140 × 140 × 25 mm
Speed200–2,800 RPM (PWM)
Airflow134.4 CFM
Static pressure2.66 mmH₂O
Noise34 dBA
BearingRifle bearing
Connector4-pin PWM
Rated lifetime50,000 hours

Related guides

AIO Liquid Cooling vs Air Cooling for CPUs

Similar Case Fans

ModelBenchmarkPriceCompare
Caldera FN-7269 Edge 120mm PWM Case Fan538$19Compare
Brontix FN-7240 Plus 120mm PWM Case Fan704$19Compare
Teralux FN-9360 Max 120mm PWM Case Fan369$19Compare
Brontix FN-2886 Ultra 120mm PWM Case Fan509$19Compare
Zephyra FN-2413 Edge 120mm PWM ARGB Case Fan995$39Compare
Zephyra FN-8430 Ti 140mm PWM ARGB Case Fan1,400$49Compare

All Case Fans · JSON

Cite this page: Hardware Spec Index, “Teralux FN-3921 Ultra 140mm PWM Case Fan (3-Pack)”, https://vextor7.com/item/2022472 (accessed 2026-10-26).