[gumby]

> I was thinking, that for Mac Pro they will go somehow with multiple processors and some magic with shared memory access...

That is what they did. Read what they wrote about their interconnect. It's just all inside a single package. Look up "chiplets".

[miklosz]

Well, no, they didn't. I understand the idea behind M1/2Ultra. However, it's not exactly the same. Can they put 4 of these dice? And 8? Currently it maxes out at 24 cores per machine, in a rack mounted chassis. That is nothing near what I can get with EPYC based servers. And there I can have multiple processors in a machine.

[gumby]

What exactly do you mean when you say “multiple processors”? The way I use the term we are talking about the same thing, except apple can only deploy fewer cores.

[miklosz]

Well, multiple processors mean multiple CPU's, not multiple dice. For example as Dell R840 series, 4xXeon 28 Cores, or R7625, 2xEpyc 96 Cores. I absolutely understand that these are specialised machines for specialised workloads. OTOH Mac Pro in rack mount is not necessary mainstream system as well, and with current approach it maxes out at 24 cores / 196GB RAM or if they somehow double it in a year or two at 48 Cores / 512 if you're lucky.