Hardware Spec Index

Zephyra CL-6903 Ultra 240mm AIO Liquid CPU Cooler

CPU Coolers · Zephyra · SKU CL6903-ULTRA · Released 2021 · Updated 2026-10-24

Key facts

Benchmark index768 (CPU Coolers scale)
Category rank#7,163
Street price$19
Power12 W
Performance per dollar40.42
Released2021

Specifications

BrandZephyra
ModelZephyra CL-6903 Ultra
TypeAll-in-one liquid cooler
Radiator240 mm, aluminum, 38 mm thick
Fans2× 120 mm, up to 1,600 RPM
Pump3,300 RPM
Rated cooling250 W (manufacturer rating)
Noise30 dBA (max)
Tubing400 mm, sleeved EPDM
Socket supportAM4, LGA1700, LGA1200, LGA115x
Warranty5 years

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Cite this page: Hardware Spec Index, “Zephyra CL-6903 Ultra 240mm AIO Liquid CPU Cooler”, https://vextor7.com/item/3583329 (accessed 2026-10-24).