Planning to purchase a server hardware for a HA environment, do i need to consider the CPU family of the new server hardware? i have Dell R740xd with 2 socket Intel(R) Xenon(R) Bronze 3104 CPU @1.7Ghz, must the new server hardware have the same CPU family?
Ideally yes, you have to have the same CPU model and RAM capacity.
EVC CPU option might help you to solve your potential issues with different CPU models/generations - but why to risk?
As your post needs moving to the area for ESXi, I have reported it to the volunteer moderators.
Your post was created in the area for ESXi on ARM (eg. Raspberry Pi) - there is a much busier area for regular ESXi, that's where I've asked the moderators to move the post to.