> if you do that in computers now, all the RAM will operate at the lowest speed That’s correct, but irrelevant in this context. In that scenario, the memory is

> if you do that in computers now, all the RAM will operate at the lowest speed That’s correct, but irrelevant in this context. In that scenario, the memory is all on the same memory controller, and the memory controller used wants to run a single speed, so it has to be the highest universally supported speed. Apple could have multiple tiers of memory with different characteristics, but just because you can, doesn’t mean you should. I don’t have access to such a test bed, so I can’t speak to what the experience would be like.