https://wccftech.com/amd-navi-31-navi-32-rdna-3-mcm-gpus-radeon-rx-7900-7800-graphics-cards-launch-rumor/

AMD next-gen MCM RDNA 3 GPUs for the Radeon RX 7000 series graphics cards have been detailed once again by Moore's Law is Dead. While the information revealed is pretty much the same that we've heard over the past few months, what's new are the launch schedules which show that AMD will release its flagship variants as early Q4 2022.

Based on the latest information from MLID, both, the AMD Navi 31 and Navi 32 GPUs will utilize an MCM solution but there's a possibility that the Navi 31 GPU could make use of 3D-Stacking while the Navi 32 GPU could make of a standard multi-die approach, similar to AMD's Instinct MI250X. It looks like Navi 31 might get a similar design as the Instinct MI300 GPUs which are going to feature a 3D-stacking technology that fuses the GPUs on top of the IO die. We have heard rumors of Infinity Cache being on a separate die so that might be what's going on here. As for Navi 32, it will carry on the same design approach as MI200 series. Both the Navi 31 and Navi 32 GPUs will be composed of 6nm IO (MCD) and 5nm GPU (GCD) chiplets.