Maximun Capacities of Ubuntu Server 20.04

Solution 1:

Given the way the question is asked, I am curious to know how much research you have done prior to visiting this site. A lot of the information you seek can be found on Ubuntu.com.

That said …

Supported architectures

⇢ x64 / ARM / Power / s390x / others (if you’re willing to do the work)

Supported CPU cores

⇢ All of them. There is no CPU in existence with more cores than a modern Linux kernel can handle.

Maximum supported RAM

⇢ 16EB (though many enterprise motherboards top out at 2TB per CPU socket)

Solution 2:

here are some references which relate to your multi-faceted question:

Ram

Architectures

Cores