AMD was working on and actually tested a vapor chamber cooling design for its Ryzen 7000 CPUs. This was recently disclosed by Gamers Nexus who visited AMD’s thermal labs. During this visit they were shown prototypes of this vapor chamber design.
AMD tested this vapor chamber design pretty extensively, but they decided to abandon the implementation of it as the temperature difference between it and the normal metal design was only 1°C. AMD also did notice that on occasion the temperature would exceed normal levels under sustained workloads. With these results as well as the increase in cost AMD dismissed the idea of using such a cooling design on their Ryzen 7000 series processors.
With Gamers Nexus getting access to AMD’s labs it is pretty interesting to see what they are working on. We highly suggest you check out the video!