Hardware Spec Index

Brontix CL-9421 Ultra 420mm AIO Liquid CPU Cooler

CPU Coolers · Brontix · SKU CL9421-ULTRA · Released 2025 · Updated 2026-10-21

Key facts

Benchmark index2,480 (CPU Coolers scale)
Category rank#14,441
Street price$189
Power17 W
Performance per dollar13.12
Released2025

Specifications

BrandBrontix
ModelBrontix CL-9421 Ultra
TypeAll-in-one liquid cooler
Radiator420 mm, aluminum, 30 mm thick
Fans3× 140 mm, up to 2,000 RPM
Pump3,400 RPM
Rated cooling330 W (manufacturer rating)
Noise29 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, “Brontix CL-9421 Ultra 420mm AIO Liquid CPU Cooler”, https://vextor7.com/item/82948069 (accessed 2026-10-21).