Hardware Spec Index

Caldera FN-6638 Ultra 120mm PWM Case Fan

Case Fans · Caldera · SKU FN6638-ULTRA · Released 2020 · Updated 2026-10-19

Key facts

Benchmark index327 (Case Fans scale)
Category rank#22,428
Street price$9
Power3 W
Performance per dollar36.33
Released2020

Specifications

BrandCaldera
ModelCaldera FN-6638 Ultra
Size120 × 120 × 25 mm
Speed200–1,600 RPM (PWM)
Airflow54.4 CFM
Static pressure1.76 mmH₂O
Noise31 dBA
BearingRifle bearing
Connector4-pin PWM
Rated lifetime150,000 hours

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Cite this page: Hardware Spec Index, “Caldera FN-6638 Ultra 120mm PWM Case Fan”, https://vextor7.com/item/4558005 (accessed 2026-10-19).