Hardware Spec Index

Caldera CL-2891 Ultra 420mm AIO Liquid CPU Cooler

CPU Coolers · Caldera · SKU CL2891-ULTRA · Released 2019 · Updated 2026-10-19

Key facts

Benchmark index2,436 (CPU Coolers scale)
Category rank#18,212
Street price$189
Power17 W
Performance per dollar12.89
Released2019

Specifications

BrandCaldera
ModelCaldera CL-2891 Ultra
TypeAll-in-one liquid cooler
Radiator420 mm, aluminum, 27 mm thick
Fans3× 140 mm, up to 1,500 RPM
Pump3,400 RPM
Rated cooling330 W (manufacturer rating)
Noise36 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-2891 Ultra 420mm AIO Liquid CPU Cooler”, https://vextor7.com/item/1477553 (accessed 2026-10-19).