Apologies for not updating you all but real life got in the way for the last few days.
I should have mentioned this but I ordered the first PC from Amazon. I returned it no problem and had a look at videos on youtube comparing the Intel and Ryzen cpu's. The 5800H seemed to do the job so I bought one, again from Amazon.
And it works! Dreamcast, Gamecube and PS2 all work perfectly at 1080p and apart from forgetting that Finalburn Neo doesn't like xbox controllers so I had to use Retroarch it's all been really easy to set up. Well, except for trying to map Wiimote motion controls to analogue sticks. Don't bother.
Even better, some kind souls have made running the Model 3 emu Supermodel really easy as you can see
HERE on youtube. So if you want to play Scud Racer or Daytona 2, or one of about a dozen fishing games, you can do it in no time.
Next will be Xbox then I will try some actual PC games but that can wait. I'm on a total Blue Skies In Games nostalgia kick just now.
If Windows 11 wasn't such a colossal pile of spyware bullshit the whole process would have been pretty painless.
Thanks again for you all taking the time to help me out.