Hardware Spec Index

Caldera CL-9721 Ultra 420mm AIO Liquid CPU Cooler

CPU Coolers · Caldera · SKU CL9721-ULTRA · Released 2021 · Updated 2026-10-26

Key facts

Benchmark index2,026 (CPU Coolers scale)
Category rank#36,497
Street price$119
Power17 W
Performance per dollar17.03
Released2021

Specifications

BrandCaldera
ModelCaldera CL-9721 Ultra
TypeAll-in-one liquid cooler
Radiator420 mm, aluminum, 27 mm thick
Fans3× 140 mm, up to 2,500 RPM
Pump2,900 RPM
Rated cooling330 W (manufacturer rating)
Noise31 dBA (max)
Tubing400 mm, sleeved EPDM
Socket supportAM4, LGA1700, LGA1200, LGA115x
Warranty5 years

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Cite this page: Hardware Spec Index, “Caldera CL-9721 Ultra 420mm AIO Liquid CPU Cooler”, https://vextor7.com/item/4033116 (accessed 2026-10-26).