Hardware Spec Index

Zephyra CL-3891 Ultra 240mm AIO Liquid CPU Cooler

CPU Coolers · Zephyra · SKU CL3891-ULTRA · Released 2021 · Updated 2026-10-18

Key facts

Benchmark index686 (CPU Coolers scale)
Category rank#1,122
Street price$19
Power12 W
Performance per dollar36.11
Released2021

Specifications

BrandZephyra
ModelZephyra CL-3891 Ultra
TypeAll-in-one liquid cooler
Radiator240 mm, aluminum, 38 mm thick
Fans2× 120 mm, up to 2,400 RPM
Pump3,300 RPM
Rated cooling250 W (manufacturer rating)
Noise26 dBA (max)
Tubing400 mm, sleeved EPDM
Socket supportAM4, LGA1700, LGA1200, LGA115x
Warranty6 years

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Cite this page: Hardware Spec Index, “Zephyra CL-3891 Ultra 240mm AIO Liquid CPU Cooler”, https://vextor7.com/item/20125090 (accessed 2026-10-18).