Hardware Spec Index

Zephyra CL-3811 Ultra 420mm AIO Liquid CPU Cooler

CPU Coolers · Zephyra · SKU CL3811-ULTRA · Released 2022 · Updated 2026-10-24

Key facts

Benchmark index2,141 (CPU Coolers scale)
Category rank#34,887
Street price$159
Power17 W
Performance per dollar13.47
Released2022

Specifications

BrandZephyra
ModelZephyra CL-3811 Ultra
TypeAll-in-one liquid cooler
Radiator420 mm, aluminum, 38 mm thick
Fans3× 140 mm, up to 2,000 RPM
Pump2,800 RPM
Rated cooling330 W (manufacturer rating)
Noise27 dBA (max)
Tubing400 mm, sleeved EPDM
Socket supportAM5, AM4, LGA1851, LGA1700
Warranty6 years

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Cite this page: Hardware Spec Index, “Zephyra CL-3811 Ultra 420mm AIO Liquid CPU Cooler”, https://vextor7.com/item/45803780 (accessed 2026-10-24).