Ok, so got a new motherboard. Asus B550-plus. Won't boot when ram (Ripjaws 3200 16-18-18-38) is set to "XMP" so only runs at 2133 at the moment. Need to find a bios update.
Crashed again 1/2 way through a great battle of Warplanes and cpu temp was reading as 48 and the video card at 52, so not likely a heat issue. After game crashed Windows is still fine.
So either the video card or psu. The system wouldn't boot after I installed the motherboard until the display port cable was in port 1. motherboard gave me a long and 3 short beeps (detect video issue). After moved it to port 1 it's been fine, not sure if that is normal or not.
Edit: Even with the latest bios this ram will not run at rate speed. Won't POST when set to DOCP (which shows the exact setting on the package the ram came in)