https://wccftech.com/rumor-amd-navi-31-will-be-an-mcm-gpu-featuring-10240-cores-and-37-tflops-of-graphics-horsepower/

According to rumors (compiled by our colleagues over at Videocardz), AMD's Navi 31 GPU will be the company's first MCM based design and pack a ton of punch. MCM designs have been the holy grail of speculation for quite a few years now and ever since AMD introduced MCM based CPUs, it has been the next logical step in their product evolution. In a way, an MCM GPU makes even more sense than a CPU - considering the largely parallel type of tasks the former handles.

An MCM GPU is a GPU that is based on chiplets and combines many of these chiplets (usually with a command or IO chip) on a single package. This technique drastically increases the yield of the GPU (as yield is inversely proportional to the size of the die) as the on-wafer size of the dies goes down instead of up. Using multiple small dies will always result in higher yields than one large monolithic die. NVIDIA is also working on its own MCM-based designs on the Hopper architecture and Intel has already demoed-ed MCM designs of its Arctic Sound platform with up to 4 tiles. The future is MCM - that much is clear - and the only question is which one of the three will get there first.