Hardware Spec Index

Caldera CL-6647 Ultra Single tower Air CPU Cooler

CPU Coolers · Caldera · SKU CL6647-ULTRA · Released 2020 · Updated 2026-10-20

Key facts

Benchmark index1,256 (CPU Coolers scale)
Category rank#16,383
Street price$59
Power3 W
Performance per dollar21.29
Released2020

Specifications

BrandCaldera
ModelCaldera CL-6647 Ultra
TypeSingle tower air cooler
Heat pipes6× 6 mm copper
Height158 mm
Fans1× 120 mm PWM, up to 1,900 RPM
Rated cooling220 W (manufacturer rating)
Noise33 dBA (max)
RAM clearanceUnrestricted
Socket supportAM4, LGA1700, LGA1200, LGA115x
Warranty6 years

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Cite this page: Hardware Spec Index, “Caldera CL-6647 Ultra Single tower Air CPU Cooler”, https://vextor7.com/item/5482569 (accessed 2026-10-20).