Noctua plans to release a pumpless thermosiphon-based CPU liquid cooler in 2026

Noctua plans to release a CPU liquid cooler using pumpless thermosiphon technology

Last weekend, Noctua hosted a “fan meeting” in Japan called “Noctua Vision” (via Hermitage Akihabara), where the company showcased some of its new and future products. At the event, Noctua CEO Roland Mossig showcased a prototype of a thermosiphon-based CPU liquid cooling solution. This cooler is reportedly due to release sometime in 2026.

What’s interesting about this new cooling solution is that it doesn’t feature a pump. This CPU liquid cooler is a two-phase thermosiphon solution, which uses a special refrigerant to transfer heat from your CPU to the cooler’s radiator.

When heated, this cooler’s coolant vaporises and moves from its water block to its radiator. Then the coolant is cooled and liquified. After that, the coolant moves back to the CPU. By lacking a pump, this cooling solution lacks a noise source and a failure point. As such, this cooling solution could be incredibly quiet and more reliable than other CPU liquid cooling solutions.

Currently, it is unknown how this cooling solution compares to traditional CPU liquid cooling solutions. The solution is said to be able to demonstrate higher levels of cooling performance than a “general water cooling unit.” Regardless, it remains to be seen if this solution has what it takes to best existing CPU liquid coolers. Beyond that, this solution has its drawbacks, as its radiator must be mounted above the user’s CPU.

If this product’s development continues well, we can expect this CPU cooler to be released in 2026.

You can join the discussion on Noctua’s planned thermosiphon-based CPU liquid cooler on the OC3D Forums.