Hardware Spec Index

Zephyra CL-3951 Ultra 420mm AIO Liquid CPU Cooler

CPU Coolers · Zephyra · SKU CL3951-ULTRA · Released 2021 · Updated 2026-10-19

Key facts

Benchmark index1,791 (CPU Coolers scale)
Category rank#26,833
Street price$99
Power17 W
Performance per dollar18.09
Released2021

Specifications

BrandZephyra
ModelZephyra CL-3951 Ultra
TypeAll-in-one liquid cooler
Radiator420 mm, aluminum, 30 mm thick
Fans3× 140 mm, up to 2,100 RPM
Pump3,200 RPM
Rated cooling330 W (manufacturer rating)
Noise33 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-3951 Ultra 420mm AIO Liquid CPU Cooler”, https://vextor7.com/item/373752 (accessed 2026-10-19).