@C-Men_Spiller Ok, so I tried this and definitely works. Absolutely no crashes, fps still high but CPU usage is constantly above 90% (it's ok). You can't do anything else on your PC or it will throttle.
I went back to 8cores on BIOS and i tried using the windows command "start /affinity F origin.exe" to run with just 4 cores and it still crashed. I did it at the "origin" level because directly at the game still uses all cores.
This is a good fix, but you need to close as much apps as possible for the best experience (least CPU usage).