Unless they are manufacturing every single chip on their boards, which they aren't, they have use pci-e.

is there a new bus technology you'd like to educate me about?

I know IBM/Mainframes tend to be on the front foot on this stuff and they havent reported any new standard or tech.

Pro here.

Okay soooooooo expansion options and bus limits? All my workloads are shoveling data to expansion, or the number of I/O interfaces I can use.

Give me the number of pcie lanes and what version. 🤌🤌🤌