Hardware Spec Index

Caldera CL-4921 Ultra 420mm AIO Liquid CPU Cooler

CPU Coolers · Caldera · SKU CL4921-ULTRA · Released 2025 · Updated 2026-10-22

Key facts

Benchmark index2,007 (CPU Coolers scale)
Category rank#33,625
Street price$129
Power17 W
Performance per dollar15.56
Released2025

Specifications

BrandCaldera
ModelCaldera CL-4921 Ultra
TypeAll-in-one liquid cooler
Radiator420 mm, aluminum, 30 mm thick
Fans3× 140 mm, up to 2,100 RPM
Pump2,900 RPM
Rated cooling330 W (manufacturer rating)
Noise34 dBA (max)
Tubing400 mm, sleeved EPDM
Socket supportAM5, AM4, LGA1851, LGA1700
Warranty5 years

Related guides

AIO Liquid Cooling vs Air Cooling for CPUsCPU TDP, PPT and Turbo Power ExplainedAMD AM5 SocketIntel LGA1851 Socket

Similar CPU Coolers

ModelBenchmarkPriceCompare
Teralux CL-9260 Ti Dual tower Air CPU Cooler2,231$189Compare
Zephyra CL-2679 Max Single tower Air CPU Cooler1,415$59Compare
Zephyra CL-9018 XT Dual tower Air CPU Cooler1,679$89Compare
Brontix CL-3261 Ti 360mm AIO Liquid CPU Cooler1,487$79Compare
Brontix CL-5021 Core 360mm AIO Liquid CPU Cooler1,688$89Compare
Brontix CL-1878 Prime Low profile Air CPU Cooler1,094$39Compare

All CPU Coolers · JSON

Cite this page: Hardware Spec Index, “Caldera CL-4921 Ultra 420mm AIO Liquid CPU Cooler”, https://vextor7.com/item/92321669 (accessed 2026-10-22).