Super Dome - Solution Sizing Doubts

[MrIndiaPST]

Dear All,

I am in a design phase for  HPE X86 Mission Critical system  Super Dome which should be fullfilled with the below;

• Final system should two separate partitions: Partition 1 should have  eight sockets and the partition 2 with four sockets.
• Both of the partition should be occupied with  18-core, 2.6 GHz Cascade Lake CPUs.
• First Partition Memory should be 3TB RAM and 4TB persistent memory, but some DIMM slots should be there for future expansion.
• Second partition should have  6TB RAM.

• My plan is with 1 base 4 socket chassis and two partition expansion chassis with 4 socket

My Doubt is that:

Which processor should i use ?

How should be DIMM & Persistent memory population for all three chassis