Ah, I see. 14 years of development has done more than just faster GPU's and CPU's, it also changed the interfaces between components.

Get it!

Seems to be reasonable to look for a new Mainboard as well. Following the logic of hardware developing, this could mean that my cable set and power supply is also incompatible with the new parts, like the Mainboard and others, right?

I'll have a closer look at this.

Thanks so far for spending time on answering my questions.

It' was already helpful.