Shown during Computex 2019 a fully passive heatsink under development by Noctua with a total weight of 1.5 kilograms.
If we talk about coolers and fans, possibly one of the first brands that comes to mind is Noctua. Noctua's fans are not pretty in design, they don't have RGB fans, but they are some of the best on the market. The company is working on something quite curious, a completely passive heatsink. This Noctua heatsink would have the capacity to dissipate 120 watts when there is natural air flow. If airflow is created by silent fans it could dissipate up to 180 watts. It also admits to install a fan for potential heat dissipation.
Noctua is developing a fully passive heatsink
Richard Swinburne, one of the Noctua workers at Computex 2019, has given a very interesting piece of information. The fully passive Noctua prototype has a weight of 1.5 kilograms. We can see that this implements up to seven pipes to displace heat to the aluminum fins.
This completely passive heatsink is designed for socket AM4 for AMD and for Intel's LGA 115x. The heatsink has been assembled with NT-H2 thermal paste, the best in the company. We are clearly talking about a lot of weight for the motherboard, being a problem that could end up damaging the motherboard. Of course, if we talk about vertical systems, if we mount it in a horizontal system there is not much more problem.
They have commented during Computex 2019, this processor could cool the Core i9-9900K on load. This is impressive, considering that this processor is not the most efficient on the market. There is no release date yet for this heatsink, as it is not yet a final design, it is in the development phase. Maybe some time passes before launching because they are optimizing it, to try to improve the dissipation efficiency.
Source: OC3D