I wasn't suggesting hybrid, or at least didn't mean to. Memory with 2 different speeds is not well supported by the OS unless you dedicate one chunk to the GPU

I wasn't suggesting hybrid, or at least didn't mean to. Memory with 2 different speeds is not well supported by the OS unless you dedicate one chunk to the GPU and the other to the CPU. So I don't think it's a good idea for AMD or Intel to go there. What I would suggest (and my suggestions are worth about as much as I'm getting paid to write this): AMD should create an I/O Die (IOD) with 512 bit DRAM memory width. Then create an AM5 variant with 128 of those connected to the socket and the other 384 tied off. Then create variants with 256 bit and 512 bits connected to on-package memory and no off-package memory pins. Sell those to laptop manufacturers. A big motivation on laptops is that slow & wide memory uses a lot less power than fast & narrow; on-package also uses a lot less power than driving the signal between chips. Then in early 2026 introduce AM6 with 4 channel 256 bit memory support. Sell AM5 & AM6 in parallel for a while.