Hardware Spec Index

Zephyra CL-6421 Max 240mm AIO Liquid CPU Cooler

CPU Coolers · Zephyra · SKU CL6421-MAX · Released 2023 · Updated 2026-10-24

Key facts

Benchmark index542 (CPU Coolers scale)
Category rank#38,833
Street price$19
Power12 W
Performance per dollar28.53
Released2023

Specifications

BrandZephyra
ModelZephyra CL-6421 Max
TypeAll-in-one liquid cooler
Radiator240 mm, aluminum, 27 mm thick
Fans2× 120 mm, up to 1,500 RPM
Pump3,000 RPM
Rated cooling250 W (manufacturer rating)
Noise35 dBA (max)
Tubing400 mm, sleeved EPDM
Socket supportAM5, AM4, LGA1851, LGA1700
Warranty5 years

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Cite this page: Hardware Spec Index, “Zephyra CL-6421 Max 240mm AIO Liquid CPU Cooler”, https://vextor7.com/item/17865976 (accessed 2026-10-24).