I don't think this is correct. https://www.macobserver.com/analysis/understanding-apples-unified-memory-architecture/ https://www.macobserver.com/analysis/unde

I don't think this is correct. https://www.macobserver.com/analysis/understanding-apples-unified-memory-architecture/ https://www.macobserver.com/analysis/understanding-apples-un... is an article which describes the architecture. It's not on-die, it's next to the CPU, basically as close as it could physically possibly be without being on the die. Here's a photo of an M1 CPU: https://www.techinreal.com/wp-content/uploads/2021/05/2feddf6775b9b4c9b60cc4436eab5a3c.jpeg https://www.techinreal.com/wp-content/uploads/2021/05/2feddf... Those chips on the right side are LPDDR4x chips (which you can verify by googling the part numbers visible on them). They are "off-the-shelf" so to speak, not custom on-die memory.