Hardware Spec Index

Caldera FN-4640 XT 140mm PWM ARGB Case Fan

Case Fans · Caldera · SKU FN4640-XT · Released 2021 · Updated 2026-10-20

Key facts

Benchmark index829 (Case Fans scale)
Category rank#45,928
Street price$29
Power3 W
Performance per dollar28.59
Released2021

Specifications

BrandCaldera
ModelCaldera FN-4640 XT
Size140 × 140 × 25 mm
Speed300–2,400 RPM (PWM)
Airflow115.2 CFM
Static pressure2.28 mmH₂O
Noise31 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-6623 Ultra 140mm PWM ARGB Case Fan1,001$39Compare
Zephyra FN-4165 Plus 120mm PWM ARGB Case Fan1,142$49Compare
Caldera FN-2173 Ti 140mm PWM Case Fan348$9Compare
Brontix FN-3858 XT 140mm PWM ARGB Case Fan972$29Compare
Zephyra FN-7056 Ti 120mm PWM ARGB Case Fan815$29Compare
Caldera FN-1644 Prime 140mm PWM Case Fan739$29Compare

All Case Fans · JSON

Cite this page: Hardware Spec Index, “Caldera FN-4640 XT 140mm PWM ARGB Case Fan”, https://vextor7.com/item/60009345 (accessed 2026-10-20).