Hardware Spec Index

Zephyra CL-6721 Ultra 240mm AIO Liquid CPU Cooler

CPU Coolers · Zephyra · SKU CL6721-ULTRA · Released 2023 · Updated 2026-10-25

Key facts

Benchmark index662 (CPU Coolers scale)
Category rank#18,919
Street price$19
Power12 W
Performance per dollar34.84
Released2023

Specifications

BrandZephyra
ModelZephyra CL-6721 Ultra
TypeAll-in-one liquid cooler
Radiator240 mm, aluminum, 30 mm thick
Fans2× 120 mm, up to 1,500 RPM
Pump2,800 RPM
Rated cooling250 W (manufacturer rating)
Noise29 dBA (max)
Tubing400 mm, sleeved EPDM
Socket supportAM5, AM4, LGA1851, LGA1700
Warranty6 years

Related guides

AIO Liquid Cooling vs Air Cooling for CPUsCPU TDP, PPT and Turbo Power ExplainedAMD AM5 Socket

Similar CPU Coolers

ModelBenchmarkPriceCompare
Zephyra CL-8578 Max Low profile Air CPU Cooler789$19Compare
Brontix CL-6443 XT Single tower Air CPU Cooler624$19Compare
Brontix CL-9368 Core Single tower Air CPU Cooler1,305$59Compare
Caldera CL-1203 Plus Single tower Air CPU Cooler1,942$109Compare
Caldera CL-8206 SE 420mm AIO Liquid CPU Cooler2,273$149Compare
Caldera CL-2431 Ultra Dual tower Air CPU Cooler1,690$109Compare

All CPU Coolers · JSON

Cite this page: Hardware Spec Index, “Zephyra CL-6721 Ultra 240mm AIO Liquid CPU Cooler”, https://vextor7.com/item/5403729 (accessed 2026-10-25).