Finally got my PC fixed. It was the CPU, not the motherboard. Got a new motherboard and had the same problem and yesterday the new CPU came in and it booted right up. Thank God for Newegg return policy.
I also decided to upgrade my case to the new Hyte y60 and get some RGB fans + an extra 32gb of RGB memory ( 32gb not enough to run deepstacked PIO sims with more than 2 sizes).
Pics incoming later when I get it all back in the case this weekend. Next step will be custom watercooling, but I need to bink an MTT first
My AIO CPU Watercooler will suffice for now.
I was also considering what to do with my old desktop. It has an old 2nd/3rd Gen i7, (not sure which, its 10 years old) with a GTX950. It was covered in dust and ran like **** but I think it can still be decent if I put it in a smaller, clean case and use a better CPU fan. I was thinking maybe a dedicated PIO computer so it can still run scripts while gaming/playing. Not sure how slow my old processor would be for that, but TBH I would be less concerned about solving speed if it was a dedicated PC for solves.