Hardware Spec Index

Caldera CL-5646 Ultra 280mm AIO Liquid CPU Cooler

CPU Coolers · Caldera · SKU CL5646-ULTRA · Released 2025 · Updated 2026-10-21

Key facts

Benchmark index1,441 (CPU Coolers scale)
Category rank#10,308
Street price$79
Power13 W
Performance per dollar18.24
Released2025

Specifications

BrandCaldera
ModelCaldera CL-5646 Ultra
TypeAll-in-one liquid cooler
Radiator280 mm, aluminum, 27 mm thick
Fans2× 140 mm, up to 1,600 RPM
Pump2,800 RPM
Rated cooling280 W (manufacturer rating)
Noise31 dBA (max)
Tubing400 mm, sleeved EPDM
Socket supportAM5, AM4, LGA1851, LGA1700
Warranty5 years

Related guides

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Cite this page: Hardware Spec Index, “Caldera CL-5646 Ultra 280mm AIO Liquid CPU Cooler”, https://vextor7.com/item/4331418 (accessed 2026-10-21).