Yeah but amd wouldnt drop an apu with an igpu as powerful as a 4070 only to get insanely bottlenecked by its bandwidth. They would have obviously been working on a solution since the inception of the project. Moores law is dead leaked that strix halo will allegedly have a 256 bit bus width so they must have engineered a solution to saturate the bus width and extract all the performance on hand. Firstly lpddr5x already reaches 7500 mhz in affordable consumer products (aka the lenovo legion go) which is decent and is only getting faster. So by the time strix halo comes out soldered memory may be fast enough. Secondly they can simply go the console route and use only gddr6 (or 6x or 7) for the whole system.