It is probably a very good test setup as it also removes teh Windows driver scenario. I would give it a try. Personally I've never heard of Vetroo supplies.I did change the PSU when i upgraded my PC to AM5.
I changeed from a Corsair 750RM to a Vetroo 1000W. Maybe that is the issue that its not a very good power supply.
I have my old AM4 PC setup in my lounge which has this PSU in it, so I can connect the RX 9070XT to see how it does. This is a Steam OS setup tho, unlike my main PC which is a Windows build, but guess that shouldnt affect things too much. If that is stable then i guess i will have to buy another PSU.