The past few days have been full of controversy surrounding AMD. Users have reported GPU hot-spot temperatures reaching 110C*. AMD responded by calling this normal behavior. In any case, YouTuber der8auer attempted to solve this mystery once and for all. In doing so, the YouTuber cut open the vapor chamber of the RX 7900 XTX.
RX 7900 XTX Dissected
The image below represents the structure of the vapor chamber used. The actual design of the 7900 XTX does not have any defects and is actually decently built with a large surface area to dissipate heat. As the CNC-drilling technique was used in this test, one can only guess if these GPUs, or rather a specific batch from these GPUs suffer from the insufficient liquid inside the chamber.
It should be noted that the GPU used for this teardown, was indeed a victim of the aforementioned thermal throttling issues. Even then, there were no obvious defects or even side effects of the excess heat. Though, it is too early for heat to damage such components.
Igor Wallossek does have a theory on this. The expert mentions that the RX 7900 XTX reference GPUs may lack ample liquid inside the vapor chamber.
This deficiency in liquid leads the GPU to be position-dependent. When hanging horizontally, the condensate would fail to come up, leading to inefficiency and the high temperatures many are witnessing. The noteworthy point here is that this applies only to one or maybe a few specific batches and not the entire RX 7900 XTX lineup.