Hardware Spec Index

Zephyra CL-4603 Ultra 420mm AIO Liquid CPU Cooler

CPU Coolers · Zephyra · SKU CL4603-ULTRA · Released 2025 · Updated 2026-10-25

Key facts

Benchmark index2,348 (CPU Coolers scale)
Category rank#11,248
Street price$179
Power17 W
Performance per dollar13.12
Released2025

Specifications

BrandZephyra
ModelZephyra CL-4603 Ultra
TypeAll-in-one liquid cooler
Radiator420 mm, aluminum, 27 mm thick
Fans3× 140 mm, up to 1,700 RPM
Pump2,800 RPM
Rated cooling330 W (manufacturer rating)
Noise31 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, “Zephyra CL-4603 Ultra 420mm AIO Liquid CPU Cooler”, https://vextor7.com/item/841567 (accessed 2026-10-25).