Hardware Spec Index

Zephyra CL-3991 SE 240mm AIO Liquid CPU Cooler

CPU Coolers · Zephyra · SKU CL3991-SE · Released 2026 · Updated 2026-10-18

Key facts

Benchmark index695 (CPU Coolers scale)
Category rank#13,072
Street price$19
Power12 W
Performance per dollar36.58
Released2026

Specifications

BrandZephyra
ModelZephyra CL-3991 SE
TypeAll-in-one liquid cooler
Radiator240 mm, aluminum, 30 mm thick
Fans2× 120 mm, up to 1,800 RPM
Pump3,200 RPM
Rated cooling250 W (manufacturer rating)
Noise31 dBA (max)
Tubing400 mm, sleeved EPDM
Socket supportAM5, AM4, LGA1851, LGA1700
Warranty5 years

Related guides

AIO Liquid Cooling vs Air Cooling for CPUsCPU TDP, PPT and Turbo Power ExplainedAMD AM5 SocketIntel LGA1851 Socket

Similar CPU Coolers

ModelBenchmarkPriceCompare
Caldera CL-1369 Core 360mm AIO Liquid CPU Cooler2,311$189Compare
Zephyra CL-7083 Core 420mm AIO Liquid CPU Cooler1,898$129Compare
Caldera CL-3574 Ti Dual tower Air CPU Cooler1,994$159Compare
Brontix CL-2742 Ultra Single tower Air CPU Cooler865$29Compare
Zephyra CL-3727 Core Single tower Air CPU Cooler1,388$69Compare
Brontix CL-8785 Edge Single tower Air CPU Cooler1,429$59Compare

All CPU Coolers · JSON

Cite this page: Hardware Spec Index, “Zephyra CL-3991 SE 240mm AIO Liquid CPU Cooler”, https://vextor7.com/item/6952011 (accessed 2026-10-18).