Update for everyone, Swapped RAM with my mate thats running a 1800X he had no problem with it, while I used his HyperX ones, still had issues. Ran your tests too @johndms RAM was fine.
Pulled out my old PSU and used that and still had issues.
Lend a mates GPU and stress tested etc. still ran into issues.
I'm left with it being either the MOBO or CPU at fault now.
This is even worse than the time I gave a Hackintosh build a go back in the day.