This has only happened a couple times so far (well, the 4th time now, happened ten minutes ago) and has happened both before and after I got my new GPU back in April.
I've looked at the event viewer, even had my brother (Cursix) take a look, but nothing really shows up as telling us what the problem is. I don't know if its possible that it's my motherboard (considering the onboard Ethernet ports were bad) or if its my PSU.
I was hoping my motherboard would have a log I could view.
CPU: i9-7900x
Ram: 64gbs
GPU: 3090 RTX Ti
Motherboard: Prime X299-Deluxe