After a bit of shopping around, I have a 1200W Corsair RM1200x SHIFT arriving tomorrow. That is lubriciously overpowered and of the 3.0 spec, so should hopefully work.
Downside with that model is that it doesn't have the native single cable recommended for some 4000 series GPUs, but an adaptor cable... but that's a problem for future Nitefly should I ever upgrade and I guess it's only a problem if the adaptor cable doesn't work....!
The real test then... can it survive Resident Evil 8 maxed out... stay turned for tomorrow's results
(It's so not going to fix it...)
Hopefully that fixes your problem man. Would be nice if you play with us