DMI 8 GT / s pc bus good or bad?

I want to buy a new PC and the bus system is "DMI" and the bus speed is 8 GT / s

what does that mean and is that sufficient performance to play games like GTA or Call of Duty or Fortnite?

You should also pay attention to the processor performance when it comes to games, i.e. How much GB RAM

Yes i know but I was unsure what this bus means and whether it is important for games etc

That is completely irrelevant. This only indicates how fast the connection to the chipset is.

Ok thanks and is what I wrote above good?

As I said, it doesn't matter. I'm quite familiar with PCs, but I do not have these DMI rates in mind on different platforms because it is so uninteresting.

Ok well thanks