I tried with SD and USB, same error. That's why I tried to reinstall everything using Debian instead of Ubuntu (on the USB at the moment), but the problem is still there. At least now there's an Oops: 0000000096000004 which is better than nothing
This was the first thing I checked, temperature was 41°C or similar when it crashed.
I set it, let's see. The board was running for a couple of days before it crashed, Let's hope it crashes sooner this time
About the wires.. I hope they are not frayed, I will try to see if I can find another power supplier.