Top-tier memory management

It's *possible*, but at present it also sounds like an incredibly niche feature for a few extra MHz that'd get shot down by manufacturers just telling users to not use mismatched RAM sticks.

This idea isn't too far from how old CPUs had independent functional units for x87/SSE/3DNow. I've heard urban legends about clever asm programmers wringing a few percent more speed out of those, but it wasn't a party trick worth spending silicon on in the long run.