Would it be possible to build a motherboard that supports multiple types of memory, or does the CPU itself have to support it?
Would it be possible to build a PC motherboard that utilizes both DDR5 and DDR4 RAM simultaneously? Ideally, it would use DDR5 for speed intensive processes, then DDR4 for background tasks or virtual machines, and be able to swap fairly quickly between the memory banks (faster than loading from disk). This seems very efficient, cost effective, and even reduces e-waste. Given the state of memory market, it would allow people to tap into lower-cost markets and utilize parts that would end up at best in a recycling plant and at worst in a landfill.
I understand that having a motherboard would only be the literal first step: then you would need a whole host of operating system support, but would you ALSO require the CPU itself to support such a feature?
Just something manufacturers should be considering given the market outlook.