Hardware Spec Index

Caldera CL-4640 Ultra 280mm AIO Liquid CPU Cooler

CPU Coolers · Caldera · SKU CL4640-ULTRA · Released 2023 · Updated 2026-10-19

Key facts

Benchmark index1,511 (CPU Coolers scale)
Category rank#10,329
Street price$79
Power13 W
Performance per dollar19.13
Released2023

Specifications

BrandCaldera
ModelCaldera CL-4640 Ultra
TypeAll-in-one liquid cooler
Radiator280 mm, aluminum, 27 mm thick
Fans2× 140 mm, up to 2,100 RPM
Pump2,900 RPM
Rated cooling280 W (manufacturer rating)
Noise33 dBA (max)
Tubing400 mm, sleeved EPDM
Socket supportAM5, AM4, LGA1851, LGA1700
Warranty5 years

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Cite this page: Hardware Spec Index, “Caldera CL-4640 Ultra 280mm AIO Liquid CPU Cooler”, https://vextor7.com/item/89170478 (accessed 2026-10-19).