Hardware Spec Index

Caldera CL-6640 Ultra Dual tower Air CPU Cooler

CPU Coolers · Caldera · SKU CL6640-ULTRA · Released 2020 · Updated 2026-10-21

Key facts

Benchmark index2,463 (CPU Coolers scale)
Category rank#14,152
Street price$179
Power6 W
Performance per dollar13.76
Released2020

Specifications

BrandCaldera
ModelCaldera CL-6640 Ultra
TypeDual tower air cooler
Heat pipes8× 6 mm copper
Height167 mm
Fans2× 120 mm PWM, up to 2,200 RPM
Rated cooling280 W (manufacturer rating)
Noise30 dBA (max)
RAM clearanceOffset fin stack, 45 mm
Socket supportAM4, LGA1700, LGA1200, LGA115x
Warranty6 years

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Cite this page: Hardware Spec Index, “Caldera CL-6640 Ultra Dual tower Air CPU Cooler”, https://vextor7.com/item/15138 (accessed 2026-10-21).